Re: [R] First value in a row
Hi Camilo, You can either use Henrik's or mine to find it, unlist(apply(dat1[,-(1:2)],1,function(x) tail(x[!is.na(x)],1))) x3 x2 x1 0.6 0.3 0.1 #or you can use my functiton dat3-data.frame(NewColumn=c(unlist(lapply(dat2,function(x) tail(x[!is.na(x)],1))),NA)) dat4-data.frame(dat1,dat3) rownames(dat4)-1:nrow(dat4) dat4 # Lat Lon x1 x2 x3 NewColumn #1 1 12 0.4 0.5 0.6 0.6 #2 1 12 0.2 0.3 NA 0.3 #3 1 11 0.1 NA NA 0.1 #4 1 10 NA NA NA NA A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: arun smartpink...@yahoo.com Cc: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:56 PM Subject: Re: First value in a row Hi Henrik and Arun, I now understand the script you provided. Very smart solution I think. I wonder, however, if there is an alternative way as to count the last number in a row?. For instance, considering the following dataframe dat1-read.table(text= Lat Lon x1 x2 x3 01 12 .4 .5 .6 01 12 .2 .3 NA 01 11 .1 NA NA 01 10 NA NA NA ,sep=,header=TRUE) the last value (from left to right) should be: .6 .3 .1 NA NAs are always consecutive once they appear. Thanks again, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii Currently available in Colombia Phone: Country code: 57 Provider code: 313 Phone 776 2282 From the USA or Canada you have to dial 011 57 313 776 2282 http://www.soc.hawaii.edu/mora/ Quoting arun smartpink...@yahoo.com: Hi Henrik, Thanks for testing it to a different dataset. I didn't test it at that time to multiple conditions. Probably, apply is a better method. Anyway, you can still get the same result by doing this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 # Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA 0.1 0.1 #2 1 11 0.4 NA 0.3 0.4 #3 1 12 NA 0.5 0.6 0.5 #Now, to a slightly different dataset dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA NA 01 11 NA NA .3 01 12 NA .6 NA ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 #Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA NA NA #2 1 11 NA NA 0.3 0.3 #3 1 12 NA 0.6 NA 0.6 I hope this works well. A.K. - Original Message - From: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de To: arun smartpink...@yahoo.com Cc: Camilo Mora cm...@dal.ca; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:18 AM Subject: Re: First value in a row Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn
Re: [R] First value in a row
Hi Camilo, Forgot dat2: #same as in previous reply. dat2-data.frame(t(dat1[,3:5])) A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: arun smartpink...@yahoo.com Cc: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:56 PM Subject: Re: First value in a row Hi Henrik and Arun, I now understand the script you provided. Very smart solution I think. I wonder, however, if there is an alternative way as to count the last number in a row?. For instance, considering the following dataframe dat1-read.table(text= Lat Lon x1 x2 x3 01 12 .4 .5 .6 01 12 .2 .3 NA 01 11 .1 NA NA 01 10 NA NA NA ,sep=,header=TRUE) the last value (from left to right) should be: .6 .3 .1 NA NAs are always consecutive once they appear. Thanks again, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii Currently available in Colombia Phone: Country code: 57 Provider code: 313 Phone 776 2282 From the USA or Canada you have to dial 011 57 313 776 2282 http://www.soc.hawaii.edu/mora/ Quoting arun smartpink...@yahoo.com: Hi Henrik, Thanks for testing it to a different dataset. I didn't test it at that time to multiple conditions. Probably, apply is a better method. Anyway, you can still get the same result by doing this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 # Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA 0.1 0.1 #2 1 11 0.4 NA 0.3 0.4 #3 1 12 NA 0.5 0.6 0.5 #Now, to a slightly different dataset dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA NA 01 11 NA NA .3 01 12 NA .6 NA ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 #Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA NA NA #2 1 11 NA NA 0.3 0.3 #3 1 12 NA 0.6 NA 0.6 I hope this works well. A.K. - Original Message - From: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de To: arun smartpink...@yahoo.com Cc: Camilo Mora cm...@dal.ca; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:18 AM Subject: Re: First value in a row Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code
Re: [R] First value in a row
a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Dipl. Psych. Henrik Singmann PhD Student Albert-Ludwigs-Universität Freiburg, Germany http://www.psychologie.uni-freiburg.de/Members/singmann __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Dipl. Psych. Henrik Singmann PhD Student Albert-Ludwigs-Universität Freiburg, Germany http://www.psychologie.uni-freiburg.de/Members/singmann __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] First value in a row
Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
Hi Camilo, as you want to work on all rows, apply() is your friend. In the following, I use an anonymous function getting the first non-na value while looping over each row: dat - read.table(text = Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 , header = TRUE) apply(dat[,-(1:2)], 1, function(x) x[!is.na(x)][1]) gives: [1] 0.1 0.2 0.4 Cheers, Henrik Camilo Mora schrieb: Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA .1 0111 .4 NA .3 0112 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Dipl. Psych. Henrik Singmann PhD Student Albert-Ludwigs-Universität Freiburg, Germany http://www.psychologie.uni-freiburg.de/Members/singmann __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
If there are a lot more rows than columns in your data.frame then looping
over columns is faster than looping over rows. Comparing
f2 - function (dataFrame)
{
retval - dataFrame[, 1]
for (col in dataFrame[-1]) {
na - is.na(retval)
if (!any(na))
break
retval[na] - col[na]
}
retval
}
to the looping over row version
f1 - function (dataFrame) apply(dataFrame, 1, function(x) x[!is.na(x)][1])
for a 250,000 row by 3 coludata.frame, f1 takes 2.48 seconds and f1 0.02.
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Henrik Singmann
Sent: Tuesday, July 24, 2012 1:40 AM
To: r-h...@stat.math.ethz.ch
Subject: Re: [R] First value in a row
Hi Camilo,
as you want to work on all rows, apply() is your friend.
In the following, I use an anonymous function getting the first non-na
value while looping over each row:
dat - read.table(text =
Lat Lon x1 x2 x3
0110 NA NA .1
0111 NA .2 .3
0112 .4 .5 .6
, header = TRUE)
apply(dat[,-(1:2)], 1, function(x) x[!is.na(x)][1])
gives:
[1] 0.1 0.2 0.4
Cheers,
Henrik
Camilo Mora schrieb:
Hi.
This is likely a trivial problem but have not found a solution. Imagine
the following dataframe:
Lat Lon x1 x2 x3
0110 NA NA .1
0111 NA .2 .3
0112 .4 .5 .6
I want to generate another column that consist of the first value in
each row from columns x1 to x3. That is
NewColumn
.1
.2
.4
Any input greatly appreciated,
Thanks,
Camilo
Camilo Mora, Ph.D.
Department of Geography, University of Hawaii
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
Hi Henrik, Thanks for testing it to a different dataset. I didn't test it at that time to multiple conditions. Probably, apply is a better method. Anyway, you can still get the same result by doing this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 # Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA 0.1 0.1 #2 1 11 0.4 NA 0.3 0.4 #3 1 12 NA 0.5 0.6 0.5 #Now, to a slightly different dataset dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA NA 01 11 NA NA .3 01 12 NA .6 NA ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 #Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA NA NA #2 1 11 NA NA 0.3 0.3 #3 1 12 NA 0.6 NA 0.6 I hope this works well. A.K. - Original Message - From: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de To: arun smartpink...@yahoo.com Cc: Camilo Mora cm...@dal.ca; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:18 AM Subject: Re: First value in a row Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Dipl. Psych. Henrik Singmann PhD Student Albert-Ludwigs-Universität Freiburg, Germany http://www.psychologie.uni-freiburg.de/Members/singmann __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
Hi Henrik and Arun, I now understand the script you provided. Very smart solution I think. I wonder, however, if there is an alternative way as to count the last number in a row?. For instance, considering the following dataframe dat1-read.table(text= Lat Lon x1 x2 x3 0112 .4 .5 .6 0112 .2 .3 NA 0111 .1 NA NA 0110 NA NA NA ,sep=,header=TRUE) the last value (from left to right) should be: .6 .3 .1 NA NAs are always consecutive once they appear. Thanks again, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii Currently available in Colombia Phone: Country code: 57 Provider code: 313 Phone 776 2282 From the USA or Canada you have to dial 011 57 313 776 2282 http://www.soc.hawaii.edu/mora/ Quoting arun smartpink...@yahoo.com: Hi Henrik, Thanks for testing it to a different dataset. I didn't test it at that time to multiple conditions. Probably, apply is a better method. Anyway, you can still get the same result by doing this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 # Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA 0.1 0.1 #2 1 11 0.4 NA 0.3 0.4 #3 1 12 NA 0.5 0.6 0.5 #Now, to a slightly different dataset dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA NA 01 11 NA NA .3 01 12 NA .6 NA ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 #Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA NA NA #2 1 11 NA NA 0.3 0.3 #3 1 12 NA 0.6 NA 0.6 I hope this works well. A.K. - Original Message - From: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de To: arun smartpink...@yahoo.com Cc: Camilo Mora cm...@dal.ca; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:18 AM Subject: Re: First value in a row Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 .4 NA .3 01 12 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 01 10 NA NA .1 01 11 NA .2 .3 01 12 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Dipl. Psych. Henrik Singmann PhD Student Albert-Ludwigs-Universität Freiburg, Germany http://www.psychologie.uni-freiburg.de/Members/singmann __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] First value in a row
This would work: X - lapply(1:nrow(dat1), function(i) rev(dat1[i, -c(1:2)]))sapply(X, function(x) x[!is.na(x)][1]) Date: Tue, 24 Jul 2012 23:56:17 -0300 From: cm...@dal.ca To: smartpink...@yahoo.com CC: r-help@r-project.org; henrik.singm...@psychologie.uni-freiburg.de Subject: Re: [R] First value in a row Hi Henrik and Arun, I now understand the script you provided. Very smart solution I think. I wonder, however, if there is an alternative way as to count the last number in a row?. For instance, considering the following dataframe dat1-read.table(text= Lat Lon x1 x2 x3 0112 .4 .5 .6 0112 .2 .3 NA 0111 .1 NA NA 0110 NA NA NA ,sep=,header=TRUE) the last value (from left to right) should be: .6 .3 .1 NA NAs are always consecutive once they appear. Thanks again, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii Currently available in Colombia Phone: Country code: 57 Provider code: 313 Phone 776 2282 From the USA or Canada you have to dial 011 57 313 776 2282 http://www.soc.hawaii.edu/mora/ Quoting arun smartpink...@yahoo.com: Hi Henrik, Thanks for testing it to a different dataset. I didn't test it at that time to multiple conditions. Probably, apply is a better method. Anyway, you can still get the same result by doing this: dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA .1 0111 .4 NA .3 0112 NA .5 .6 ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 # Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA 0.1 0.1 #2 1 11 0.4 NA 0.3 0.4 #3 1 12 NA 0.5 0.6 0.5 #Now, to a slightly different dataset dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA NA 0111 NA NA .3 0112 NA .6 NA ,sep=,header=TRUE) dat2-data.frame(t(dat1[,3:5])) dat3-data.frame(dat1,NewColumn=unlist(lapply(dat2,function(x) x[!is.na(x)][1]))) row.names(dat3)-1:nrow(dat3) dat3 #Lat Lon x1 x2 x3 NewColumn #1 1 10 NA NA NANA #2 1 11 NA NA 0.3 0.3 #3 1 12 NA 0.6 NA 0.6 I hope this works well. A.K. - Original Message - From: Henrik Singmann henrik.singm...@psychologie.uni-freiburg.de To: arun smartpink...@yahoo.com Cc: Camilo Mora cm...@dal.ca; R help r-help@r-project.org Sent: Tuesday, July 24, 2012 10:18 AM Subject: Re: First value in a row Hi, As Arun's idea was also my first idea let me pinpoint the problem of this solution. It only works if the data in question (i.e., columns x1 to x3) follow the pattern of the example data insofar that the NAs form a triangle like structure. This is so because it loops over columns instead of rows and takes advantage of the triangle NA structure. For example, slightly changing the data leads to a result that does not follow the description of Camilo seem to want: dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA .1 0111 .4 NA .3 0112 NA .5 .6 ,sep=,header=TRUE) # correct answer from description would be .1, .4, .5 # arun's solution: data.frame(dat1,NewColumn=rev(unlist(lapply(dat1[,3:5],function(x) x[!is.na(x)][1] # x3 x2 x1 # 0.1 0.5 0.4 # my solution: apply(dat1[,-(1:2)], 1, function(x) x[!is.na(x)][1]) # [1] 0.1 0.4 0.5 So the question is, what you want and how the data looks. Cheers, Henrik Am 24.07.2012 14:27, schrieb arun: Hi, Try this: dat1-read.table(text= Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 ,sep=,header=TRUE) dat2-dat1[,3:5] dat3-data.frame(dat1,NewColumn=rev(unlist(lapply(dat2,function(x) x[!is.na(x)][1] row.names(dat3)-1:nrow(dat3) dat3 Lat Lon x1 x2 x3 NewColumn 1 1 10 NA NA 0.1 0.1 2 1 11 NA 0.2 0.3 0.2 3 1 12 0.4 0.5 0.6 0.4 A.K. - Original Message - From: Camilo Mora cm...@dal.ca To: r-help@r-project.org Cc: Sent: Tuesday, July 24, 2012 2:48 AM Subject: [R] First value in a row Hi. This is likely a trivial problem but have not found a solution. Imagine the following dataframe: Lat Lon x1 x2 x3 0110 NA NA .1 0111 NA .2 .3 0112 .4 .5 .6 I want to generate another column that consist of the first value in each row from columns x1 to x3. That is NewColumn .1 .2 .4 Any input greatly appreciated, Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help
[R] first value...
Hi, I've a vector like this: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
Try this: which(diff(is.na(inc)) 0) On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
Now is ok...thanks. Alfredo 2009/6/23 Alfredo Alessandrini alfreal...@gmail.com: I've the NA value also between the value of the vector: inc [1] NA NA NA NA NA NA NA [8] NA NA NA NA NA NA NA [15] NA NA NA NA NA NA NA [22] NA NA NA NA NA NA NA [29] NA NA NA NA NA NA NA [36] NA NA NA NA NA NA NA [43] NA NA NA NA NA NA NA [50] NA NA NA NA NA NA NA [57] NA NA NA NA NA NA NA [64] NA NA NA NA NA NA NA [71] NA NA NA NA NA NA NA [78] NA NA NA NA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 [106] 4.280065 5.942021 6.292010 11.866446 19.450442 11.942362 6.224328 [113] 3.176050 5.456117 2.733487 3.992823 13.633171 19.514301 25.085256 [120] 5.640089 5.890486 12.421150 18.821420 22.478664 11.503805 7.051254 [127] 7.560921 12.000394 20.464875 16.147598 13.746290 9.416060 35.848221 [134] 36.739481 23.516759 7.317599 3.928247 10.371437 11.202935 12.574649 [141] 6.906980 9.191260 7.080267 2.810271 5.494705 10.617141 14.578020 [148] 10.981610 7.343975 2.179511 2.726651 10.794842 9.872493 NA [155] 10.525064 16.134541 29.283385 18.352996 9.216318 6.253805 2.704267 [162] 4.274514 3.138237 12.296835 20.982433 13.001104 2.606328 3.333271 [169] 5.514425 2.179244 5.381514 6.848380 3.794428 5.114591 4.975830 [176] 3.809948 10.131608 14.145913 inc[82] [1] 13.09550 which(diff(is.na(inc)) 0) [1] 81 154 inc[154] [1] NA I must obtain only the first value, in this case: inc[82]. Regards, Alfredo 2009/6/23 Henrique Dallazuanna www...@gmail.com Try this: which(diff(is.na(inc)) 0) On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1] NA NA NA NA NA NA NA [8] NA NA NA NA NA NA NA [15] NA NA NA NA NA NA NA [22] NA NA NA NA NA NA NA [29] NA NA NA NA NA NA NA [36] NA NA NA NA NA NA NA [43] NA NA NA NA NA NA NA [50] NA NA NA NA NA NA NA [57] NA NA NA NA NA NA NA [64] NA NA NA NA NA NA NA [71] NA NA NA NA NA NA NA [78] NA NA NA NA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O -- __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
On Jun 23, 2009, at 10:00 AM, Alfredo Alessandrini wrote: Hi, I've a vector like this: inc [1]NANANANANA NANA [8]NANANANANA NANA [15]NANANANANA NANA [22]NANANANANA NANA [29]NANANANANA NANA [36]NANANANANA NANA [43]NANANANANA NANA [50]NANANANANA NANA [57]NANANANANA NANA [64]NANANANANA NANA [71]NANANANANA NANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 which(!is.na(inc))[1] Regards, Alfredo David Winsemius, MD Heritage Laboratories West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
I've the NA value also between the value of the vector: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 [106] 4.280065 5.942021 6.292010 11.866446 19.450442 11.942362 6.224328 [113] 3.176050 5.456117 2.733487 3.992823 13.633171 19.514301 25.085256 [120] 5.640089 5.890486 12.421150 18.821420 22.478664 11.503805 7.051254 [127] 7.560921 12.000394 20.464875 16.147598 13.746290 9.416060 35.848221 [134] 36.739481 23.516759 7.317599 3.928247 10.371437 11.202935 12.574649 [141] 6.906980 9.191260 7.080267 2.810271 5.494705 10.617141 14.578020 [148] 10.981610 7.343975 2.179511 2.726651 10.794842 9.872493NA [155] 10.525064 16.134541 29.283385 18.352996 9.216318 6.253805 2.704267 [162] 4.274514 3.138237 12.296835 20.982433 13.001104 2.606328 3.333271 [169] 5.514425 2.179244 5.381514 6.848380 3.794428 5.114591 4.975830 [176] 3.809948 10.131608 14.145913 inc[82] [1] 13.09550 which(diff(is.na(inc)) 0) [1] 81 154 inc[154] [1] NA I must obtain only the first value, in this case: inc[82]. Regards, Alfredo 2009/6/23 Henrique Dallazuanna www...@gmail.com Try this: which(diff(is.na(inc)) 0) On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1] NA NA NA NA NA NA NA [8] NA NA NA NA NA NA NA [15] NA NA NA NA NA NA NA [22] NA NA NA NA NA NA NA [29] NA NA NA NA NA NA NA [36] NA NA NA NA NA NA NA [43] NA NA NA NA NA NA NA [50] NA NA NA NA NA NA NA [57] NA NA NA NA NA NA NA [64] NA NA NA NA NA NA NA [71] NA NA NA NA NA NA NA [78] NA NA NA NA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O -- -- Alfredo Alessandrini, Dr. Post-doc Department of Environment and Forest (DAF) Unitus - Viterbo http://www.unitus.it/dipartimenti/daf/dendro/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
Alfredo Alessandrini wrote: Hi, I've a vector like this: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. one way: which(!is.na(inc))[1] # 82 vQ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
On Tue, Jun 23, 2009 at 04:00:21PM +0200, Alfredo Alessandrini wrote: I've a vector like this: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 which(!is.na(inc))[1] cu Philipp -- Dr. Philipp Pagel Lehrstuhl für Genomorientierte Bioinformatik Technische Universität München Wissenschaftszentrum Weihenstephan 85350 Freising, Germany http://webclu.bio.wzw.tum.de/~pagel/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
min(which(is.na(inc)==FALSE)) #index inc[min(which(is.na(inc)==FALSE))] #value hth daniel - cuncta stricte discussurus - -Ursprüngliche Nachricht- Von: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Im Auftrag von Alfredo Alessandrini Gesendet: Tuesday, June 23, 2009 10:00 AM An: r-help@r-project.org Betreff: [R] first value... Hi, I've a vector like this: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
You can use this: inc[which(!is.na(inc))[1]] On Tue, Jun 23, 2009 at 11:08 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: I've the NA value also between the value of the vector: inc [1]NANANANANANANA [8]NANANANANANANA [15]NANANANANANANA [22]NANANANANANANA [29]NANANANANANANA [36]NANANANANANANA [43]NANANANANANANA [50]NANANANANANANA [57]NANANANANANANA [64]NANANANANANANA [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 [106] 4.280065 5.942021 6.292010 11.866446 19.450442 11.942362 6.224328 [113] 3.176050 5.456117 2.733487 3.992823 13.633171 19.514301 25.085256 [120] 5.640089 5.890486 12.421150 18.821420 22.478664 11.503805 7.051254 [127] 7.560921 12.000394 20.464875 16.147598 13.746290 9.416060 35.848221 [134] 36.739481 23.516759 7.317599 3.928247 10.371437 11.202935 12.574649 [141] 6.906980 9.191260 7.080267 2.810271 5.494705 10.617141 14.578020 [148] 10.981610 7.343975 2.179511 2.726651 10.794842 9.872493NA [155] 10.525064 16.134541 29.283385 18.352996 9.216318 6.253805 2.704267 [162] 4.274514 3.138237 12.296835 20.982433 13.001104 2.606328 3.333271 [169] 5.514425 2.179244 5.381514 6.848380 3.794428 5.114591 4.975830 [176] 3.809948 10.131608 14.145913 inc[82] [1] 13.09550 which(diff(is.na(inc)) 0) [1] 81 154 inc[154] [1] NA I must obtain only the first value, in this case: inc[82]. Regards, Alfredo 2009/6/23 Henrique Dallazuanna www...@gmail.com Try this: which(diff(is.na(inc)) 0) On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1]NANANANANANA NA [8]NANANANANANA NA [15]NANANANANANA NA [22]NANANANANANA NA [29]NANANANANANA NA [36]NANANANANANA NA [43]NANANANANANA NA [50]NANANANANANA NA [57]NANANANANANA NA [64]NANANANANANA NA [71]NANANANANANA NA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O -- -- Alfredo Alessandrini, Dr. Post-doc Department of Environment and Forest (DAF) Unitus - Viterbo http://www.unitus.it/dipartimenti/daf/dendro/ -- -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
I think what you mean is that you want to find the position of the first non-NA value in the vector. is.na returns a boolean vector of the NA values, so: xx - c(NA,NA,NA,2,3,NA,4) which(!is.na(xx))[1] [1] 4 The other proposed solution, which(diff(is.na(inc)) 0) is incorrect: which(diff(is.na(xx))0) [1] 3 6 -s On Tue, Jun 23, 2009 at 10:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1]NANANANANANA NA... [71]NANANANANANANA [78]NANANANA 13.095503 10.140119 7.989186 ... I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
Hi r-help-boun...@r-project.org napsal dne 23.06.2009 16:04:49: Try this: which(diff(is.na(inc)) 0) Shall it be which(diff(is.na(inc)) 0)+1 or sum(is.na(inc))+1 or any other suitable construct with is.na Regards Petr On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreal...@gmail.com wrote: Hi, I've a vector like this: inc [1]NANANANANANA NA [8]NANANANANANA NA [15]NANANANANANA NA [22]NANANANANANA NA [29]NANANANANANA NA [36]NANANANANANA NA [43]NANANANANANA NA [50]NANANANANANA NA [57]NANANANANANA NA [64]NANANANANANA NA [71]NANANANANANA NA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 Regards, Alfredo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] first value...
The various which(is.na) sort of things are fine, but this problem is just screaming to be solved with rle(). Just do rle(is.na(inc))$lengths[1]+1 On Tue, Jun 23, 2009 at 11:00 AM, Alfredo Alessandrini alfreale74 at gmail.com wrote: Hi, I've a vector like this: inc [1]NANANANANANA NA [8]NANANANANANA NA [15]NANANANANANA NA [22]NANANANANANA NA [29]NANANANANANA NA [36]NANANANANANA NA [43]NANANANANANA NA [50]NANANANANANA NA [57]NANANANANANA NA [64]NANANANANANA NA [71]NANANANANANA NA [78]NANANANA 13.095503 10.140119 7.989186 [85] 8.711888 7.201234 13.029250 14.430755 8.662832 8.810785 14.421302 [92] 7.614985 7.548091 9.843389 14.977402 20.875255 7.787543 2.005056 [99] 4.016916 3.601773 4.140390 7.241999 13.280794 18.038902 18.762169 I must obtain the position of first value of the vector... In this case is 82. inc[82] [1] 13.09550 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
