Re: [R] Multilevel model in lme4 and nlme
Hi Ben, thanks for your reply. Your suggestion does not work indeed: lme(y ~ x, random=list(~1|a:b, ~1|b:c), data=mydata) Error in getGroups.data.frame(dataMix, groups) : Invalid formula for groups Here is a reproducible example of my data: set.seed(123) library(lme4) library(nlme) y- rnorm(30) x-rnorm(30) a- factor(sort(rep(c(alpha, beta, charlie), 10))) b- factor(rep(c(rho, epsilon, lambda), 10)) c- factor(c(sort(rep(1:2, 5)), sort(rep(3:4, 5)), sort(rep(5:6, 5 mydata- data.frame(y,x,a,b,c) mod1- lmer(y ~ x + (1|a:b) + (1|b:c), data=mydata) mod2.lme- lme(y ~ x, random=list(a=~1, b=~1, c=~1), data=mydata) mod2.lmer- lmer(y ~ x + (1|a) + (1|a:b) + (1|a:b:c), data=mydata) My objective is to specify mod1 using function lme. Anyone knows how to do it? Thanks J On Mon, Sep 12, 2011 at 9:43 PM, Ben Bolker bbol...@gmail.com wrote: jonas garcia garcia.jonas80 at googlemail.com writes: I am trying to fit some mixed models using packages lme4 and nlme. I did the model selection using lmer but I suspect that I may have some autocorrelation going on in my data so I would like to have a look using the handy correlation structures available in nlme. The problem is that I cannot translate my lmer model to lme: mod1- lmer(y~x + (1|a:b) + (1|b:c), data=mydata) a, b and c are factors with c nested in b and b nested in a The best I can do with lme is: mod2- lme(y~x, random=list(a=~1, b=~1, c=~1), data=mydata) which is the same as: lmer(y~x + (1|a) + (1|a:b) + (1|a:b:c), data=mydata) I am not at all interested in random effects (1|a) and (1|a:b:c) as they are not significant. I just need two random intercepts as specified in mod1. How can I translate mod1 into lme language? Any help on this would be much appreciated. This would probably be better on the r-sig-mixed-models list. Does random=list(~1|a:b,~1|b:c) work? I would be a little bit careful throwing out ~1|a (non-significance is not necessarily sufficient reason to discard a term from the model -- it depends a lot on your procedure), and with the interpretation of your nesting. If b is only explicitly and not implicitly nested in a (i.e. if there a levels of 'b' that occur in more than one level of 'a', for example if a corresponded to families, b corresponded to individuals, and you labeled individuals 1..N_b_i in each family) then I'm not sure how you would actually interpret b:c, as it would be crossed rather than nested. But assuming that your model specification in lmer is correct and sensible, I think my suggestion above should (?) work to get the equivalent in lme. Jonas __ 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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[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] Multilevel model in lme4 and nlme
Dear list, I am trying to fit some mixed models using packages lme4 and nlme. I did the model selection using lmer but I suspect that I may have some autocorrelation going on in my data so I would like to have a look using the handy correlation structures available in nlme. The problem is that I cannot translate my lmer model to lme: mod1- lmer(y~x + (1|a:b) + (1|b:c), data=mydata) a, b and c are factors with c nested in b and b nested in a The best I can do with lme is: mod2- lme(y~x, random=list(a=~1, b=~1, c=~1), data=mydata) which is the same as: lmer(y~x + (1|a) + (1|a:b) + (1|a:b:c), data=mydata) I am not at all interested in random effects (1|a) and (1|a:b:c) as they are not significant. I just need two random intercepts as specified in mod1. How can I translate mod1 into lme language? Any help on this would be much appreciated. Jonas [[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] calculate area between intersecting polygons
Many thanks for your help! Thanks to you guys I manage to solve my problem in an efficient way All the best J On Tue, Oct 26, 2010 at 11:04 PM, Remko Duursma remkoduur...@gmail.comwrote: I don't know why I forgot that you can do this as well : area.poly(intersect(p1,p2)) ... a bit more straightforward. greetings, Remko -- View this message in context: http://r.789695.n4.nabble.com/calculate-area-between-intersecting-polygons-tp3012980p3014581.html Sent from the R help mailing list archive at Nabble.com. __ 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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[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] calculate area between intersecting polygons
Thanks for your reply, My main issue is that I don't have any equations to generate the data, just a bunch of points, each corresponding to a polygon. I was looking in package sp and there is a function to calculate areas ( areapl()), but not for intersecting polygons. Is there any other package that does this? Thanks On Tue, Oct 26, 2010 at 3:38 AM, Remko Duursma remkoduur...@gmail.comwrote: Dear Jonas, if you can write the difference in y-values between your polygons as a function, you can use integrate() to get the area between the polygons. It sounds like perhaps your x-values will not match between the polygons because they come from different sources, so you probably have to do some interpolating (with ?approx). hope that helps, Remko -- View this message in context: http://r.789695.n4.nabble.com/calculate-area-between-intersecting-polygons-tp3012980p3013059.html Sent from the R help mailing list archive at Nabble.com. __ 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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[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] calculate area between intersecting polygons
Dear list: I am trying to calculate the intersection area between two irregular polygons (see example data below). set.seed(1234) theta - seq(0, 2 * pi, length=(100)) poly1- cbind(c(0 + 1 * cos(theta) + rnorm(100, sd=0.1)), c(0 + 2 * sin(theta))) poly2- cbind(c(0 + 2 * cos(theta) ), c(-1 + 1.5 * sin(theta)+ rnorm(100, sd=0.1))) plot(x, y, type = n, , xlim=c(-5,5), ylim=c(-5,5)) polygon(poly1) polygon(poly2) My data correspond to geographical positions, therefore I cannot generate it using equations as I did in the example. Are there any straightforward algorithm to calculate the intersection area between polygons poly1 and poly2? Thank you so much in advance Jonas [[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 identifying clusters
Dear list: I have a dataset of geographical data that looks like this example data: dat- data.frame( lon = c(rnorm(1000, mean=-10), rnorm(1000, mean=10), rnorm(1000, mean=5)), lat = c(rnorm(1000, mean=40), rnorm(1000, mean=30), rnorm(1000, mean=0))) plot(dat$lon, dat$lat) My positions are clearly clustered (in this example there are 3 clusters). Is there any R algorithm that allows me to identify the three groups of points and allocate to each pair the respective cluster? Many thanks in advance Jonas [[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] End of line marker?
Jim, Duncan and David, Thanks to you guys I manage to solve the problem and I have learnt a lot. Best regards J On Fri, Mar 5, 2010 at 4:55 AM, Duncan Murdoch murd...@stats.uwo.ca wrote: On 04/03/2010 11:40 PM, David Winsemius wrote: On Mar 4, 2010, at 10:58 PM, Duncan Murdoch wrote: On 04/03/2010 10:32 PM, David Winsemius wrote: On Mar 4, 2010, at 9:47 PM, jonas garcia wrote: When I opened the file with a hex-editor, the problematic character turned out to be 1a I am attaching a sample DAT file with 3 lines (the second line is the one with the undesirable character). The furthest I could get was through readBin: tmp- readBin(new.dat, what = raw, n=1) [1] 30 32 3a 33 35 3a 33 32 2c 20 34 34 30 33 2c 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 2c 31 [33] 35 35 2e 39 2c 30 30 2e 37 36 2c 31 31 35 36 0d 0a 30 32 3a 33 35 3a 33 35 2c 20 34 34 33 32 2c [65] 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 2c 31 35 35 2e 38 2c 1a 30 2e 38 31 2c 31 31 35 37 [97] 0d 0a 30 32 3a 33 35 3a 33 39 2c 20 34 34 36 37 2c 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 [129] 2c 31 35 35 2e 38 2c 30 30 2e 38 31 2c 31 31 35 38 tmp[87] [1] 1a I got a different interpretation of that character when I let R look at it. And I cannot figure out why \032 should be causing problems??? : Hex 1a and octal 032 both correspond to Ctrl-Z, which is the MSDOS EOF marker. I forget whether R's text reading routines pay attention to that, or whether it's the C runtime, but it makes sense that it would cause problems on Windows. Duncan Murdoch Thanks. I was interpreting \032 as decimal, so couldn't figure out why it should equal 0x1A. You've explained the basis (or base) of my confusion. By the way, here's one way to remove the bad char. Read it using readBin as above, then tmp - tmp[tmp != 0x1a] to remove the bad chars, or tmp[tmp == 0x1a] - charToRaw( ) to replace them with spaces. Then write the tmp vector out to a file with writeBin. Duncan Murdoch [[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] End of line marker?
Thank you so much for your reply. I can identify the characters very easily in a couple of files. The reason I am worried is that I have thousands of files to read in. The files were produced in a very old MS-DOS software that records information on oceanographic data and geographic position during a survey. My main goal is read all these files into R for further analysis. Most of the files are cleared of these EOL markers but some are not. I only noticed the problem by chance when I was looking and comparing one of them. I wonder if I can solve this problem using R, without having to go for text editors separately. Help on this would be much appreciated. Thanks again J On 3/4/10, David Winsemius dwinsem...@comcast.net wrote: On Mar 3, 2010, at 2:22 PM, jonas garcia wrote: Dear R users, I am trying to read a huge file in R. For some reason, only a part of the file is read. When I further investigated, I found that in one of my non-numeric columns, there is one odd character responsible for this, which I reproduce bellow: In case you cannot see it, it looks like a right arrow, but it is not the one you get from microsoft word in menu insert symbol. I think my dat file is broken and that funny character is an EOL marker that makes R not read the rest of the file. I am sure the character is there by chance but I fear that it might be present in some other big files I have to work with as well. So, is there any clever way to remove this inconvenient character in R avoiding having to edit the file in notepad and remove it manually? Code I am using: read.csv(new3.dat, header=F) Warning message: In read.table(file = file, header = header, sep = sep, quote = quote, : incomplete final line found by readTableHeader on 'new3.dat' I think you should identify the offending line by using the count.fields function and fix it with an editor. -- David I am working with R 2.10.1 in windows XP. Thanks in advance Jonas [[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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Heritage Laboratories West Hartford, CT [[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] End of line marker?
When I opened the file with a hex-editor, the problematic character turned out to be “1a” I am attaching a sample DAT file with 3 lines (the second line is the one with the undesirable character). The furthest I could get was through readBin: tmp- readBin(new.dat, what = raw, n=1) [1] 30 32 3a 33 35 3a 33 32 2c 20 34 34 30 33 2c 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 2c 31 [33] 35 35 2e 39 2c 30 30 2e 37 36 2c 31 31 35 36 0d 0a 30 32 3a 33 35 3a 33 35 2c 20 34 34 33 32 2c [65] 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 2c 31 35 35 2e 38 2c 1a 30 2e 38 31 2c 31 31 35 37 [97] 0d 0a 30 32 3a 33 35 3a 33 39 2c 20 34 34 36 37 2c 20 33 37 2e 31 31 34 2c 2d 32 30 2e 38 33 36 [129] 2c 31 35 35 2e 38 2c 30 30 2e 38 31 2c 31 31 35 38 tmp[87] [1] 1a The idea now is as Jim suggested, replace “1a” by (for example) “20” in the raw format and write the file back with writeBin(tmp, new2.dat) Can I use gsub? How can I perform this operation without messing around with the raw format? Thanks J On Thu, Mar 4, 2010 at 8:35 PM, jim holtman jholt...@gmail.com wrote: Have you considered reading the file in a binary/raw, finding the offending character and replacing it with a blank (or whatever and then writing the file back out). You can then probably process it using read.table.; On Thu, Mar 4, 2010 at 12:50 PM, jonas garcia garcia.jona...@googlemail.com wrote: Thank you so much for your reply. I can identify the characters very easily in a couple of files. The reason I am worried is that I have thousands of files to read in. The files were produced in a very old MS-DOS software that records information on oceanographic data and geographic position during a survey. My main goal is read all these files into R for further analysis. Most of the files are cleared of these EOL markers but some are not. I only noticed the problem by chance when I was looking and comparing one of them. I wonder if I can solve this problem using R, without having to go for text editors separately. Help on this would be much appreciated. Thanks again J On 3/4/10, David Winsemius dwinsem...@comcast.net wrote: On Mar 3, 2010, at 2:22 PM, jonas garcia wrote: Dear R users, I am trying to read a huge file in R. For some reason, only a part of the file is read. When I further investigated, I found that in one of my non-numeric columns, there is one odd character responsible for this, which I reproduce bellow: In case you cannot see it, it looks like a right arrow, but it is not the one you get from microsoft word in menu insert symbol. I think my dat file is broken and that funny character is an EOL marker that makes R not read the rest of the file. I am sure the character is there by chance but I fear that it might be present in some other big files I have to work with as well. So, is there any clever way to remove this inconvenient character in R avoiding having to edit the file in notepad and remove it manually? Code I am using: read.csv(new3.dat, header=F) Warning message: In read.table(file = file, header = header, sep = sep, quote = quote, : incomplete final line found by readTableHeader on 'new3.dat' I think you should identify the offending line by using the count.fields function and fix it with an editor. -- David I am working with R 2.10.1 in windows XP. Thanks in advance Jonas [[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.htmlhttp://www.r-project.org/posting-guide.html http://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Heritage Laboratories West Hartford, CT [[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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? __ 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] End of line marker?
Dear R users, I am trying to read a huge file in R. For some reason, only a part of the file is read. When I further investigated, I found that in one of my non-numeric columns, there is one odd character responsible for this, which I reproduce bellow: In case you cannot see it, it looks like a right arrow, but it is not the one you get from microsoft word in menu insert symbol. I think my dat file is broken and that funny character is an EOL marker that makes R not read the rest of the file. I am sure the character is there by chance but I fear that it might be present in some other big files I have to work with as well. So, is there any clever way to remove this inconvenient character in R avoiding having to edit the file in notepad and remove it manually? Code I am using: read.csv(new3.dat, header=F) Warning message: In read.table(file = file, header = header, sep = sep, quote = quote, : incomplete final line found by readTableHeader on 'new3.dat' I am working with R 2.10.1 in windows XP. Thanks in advance Jonas [[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] axis labels
Problem solved!
thanks
J
On Wed, Oct 14, 2009 at 12:31 AM, S Ellison s.elli...@lgc.co.uk wrote:
They probably look different because the y-axis distance is to the
bottom of the number and the x-axis to the top; character adjustment is
putting the actual locations in the 'same' place but with opposing
orientation.
Try fooling about with the mgp argument in axis():
par(mfrow=c(1,1), cex.axis = 0.5, cex.lab = 0.5)
plot(1,1, axes = F)
axis(1, mgp=c(3,0.7,0))
axis(2, mgp=c(3,1,0))
jonas garcia garcia.jona...@googlemail.com 10/13/09 5:58 PM
Dear list,
why does the distance between the axis labels and the tick marks looks
different for x axis and y axis in the plot (see code below).
In fact, the x axis labels look furthest from the tickmarks than in the
y
axis.
How can I make them look the same?
par(mfrow=c(1,1), cex.axis = 0.5, cex.lab = 0.5)
plot(1,1, axes = F)
axis(1)
axis(2)
Thanks in advance
Jonas
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[R] axis labels
Dear list, why does the distance between the axis labels and the tick marks looks different for x axis and y axis in the plot (see code below). In fact, the x axis labels look furthest from the tickmarks than in the y axis. How can I make them look the same? par(mfrow=c(1,1), cex.axis = 0.5, cex.lab = 0.5) plot(1,1, axes = F) axis(1) axis(2) Thanks in advance Jonas [[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] help with functions
Thanks Baptiste
On Fri, Sep 4, 2009 at 5:13 PM, baptiste auguie
baptiste.aug...@googlemail.com wrote:
Hi,
I think you've got a problem with environments,
testA-function(input=1)
{
dat - data.frame(A=seq(input,5), B=seq(6,10))
vec.names- c(a, b)
env - new.env()
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab, env=env)
}
do.call(rbind, lapply(vec.names, get, env=env))
}
testA()
But more generally, I doubt your construct using assign and get is the most
natural way to reach your goal in R.
HTH,
baptiste
2009/9/4 jonas garcia garcia.jona...@googlemail.com
Hi all,
I have got 2 function (see bellow) which are simplifications of what I
need
to do. These functions are precisely the same, except for the last line.
My question is, why doesn't function testA work in the same way as
function
testB.
Both functions produce two objects, a and b that must merged with
rbind.
The difference is that in testA, I specify the name of the objects while
in
testA I am stating which objects I want to bind from a character vector.
What's more, if I just run the code without a function (example given
below
as well), they both work...
Why is this?
Thanks in advance
Jonas
testA-function(input)
{
dat- data.frame(A=seq(input,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
do.call(rbind, lapply(vec.names, get))
}
testB-function(input)
{
dat- data.frame(A=seq(input,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
rbind(a,b)
}
testA(1)
Error in FUN(c(a, b)[[1L]], ...) : object 'a' not found
testB(1)
[,1] [,2] [,3] [,4] [,5]
a01234
b56789
###
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
do.call(rbind, lapply(vec.names, get))
[,1] [,2] [,3] [,4] [,5]
[1,]01234
[2,]56789
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
rbind(a,b)
[,1] [,2] [,3] [,4] [,5]
a01234
b56789
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PLEASE do read the posting guide
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--
_
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
http://newton.ex.ac.uk/research/emag
__
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and provide commented, minimal, self-contained, reproducible code.
[R] help with functions
Hi all,
I have got 2 function (see bellow) which are simplifications of what I need
to do. These functions are precisely the same, except for the last line.
My question is, why doesn't function testA work in the same way as function
testB.
Both functions produce two objects, a and b that must merged with rbind.
The difference is that in testA, I specify the name of the objects while in
testA I am stating which objects I want to bind from a character vector.
What's more, if I just run the code without a function (example given below
as well), they both work...
Why is this?
Thanks in advance
Jonas
testA-function(input)
{
dat- data.frame(A=seq(input,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
do.call(rbind, lapply(vec.names, get))
}
testB-function(input)
{
dat- data.frame(A=seq(input,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
rbind(a,b)
}
testA(1)
Error in FUN(c(a, b)[[1L]], ...) : object 'a' not found
testB(1)
[,1] [,2] [,3] [,4] [,5]
a01234
b56789
###
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
do.call(rbind, lapply(vec.names, get))
[,1] [,2] [,3] [,4] [,5]
[1,]01234
[2,]56789
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
rbind(a,b)
[,1] [,2] [,3] [,4] [,5]
a01234
b56789
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Re: [R] cbind objects using character vectors
Thanks Erik and Henrique,
That's what I was after.
Jonas
On Tue, Sep 1, 2009 at 8:08 PM, Henrique Dallazuanna www...@gmail.comwrote:
Try this:
sapply(vec.names, get)
But for this example, you don't need for, try:
dat - 1
On Tue, Sep 1, 2009 at 2:52 PM, jonas garcia
garcia.jona...@googlemail.com wrote:
Dear list,
I have a character vector such vec.names- c(a, b)
It happens that I have also two R objects called a and b that I would
like to merge. Is it possible to
do something like cbind(vec.names[1], vec.names[2]) ending up with the
same
result as cbind(a,b)
Bellow is a reproducible example of what I need to to:
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
cbind(vec.names[1], vec.names[2])
[,1] [,2]
[1,] a b
But I was looking after the following result (using vec.names):
cbind(a,b)
a b
[1,] 0 5
[2,] 1 6
[3,] 2 7
[4,] 3 8
[5,] 4 9
Thanks in advance
Jonas
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--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40 S 49° 16' 22 O
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[R] cbind objects using character vectors
Dear list,
I have a character vector such vec.names- c(a, b)
It happens that I have also two R objects called a and b that I would
like to merge. Is it possible to
do something like cbind(vec.names[1], vec.names[2]) ending up with the same
result as cbind(a,b)
Bellow is a reproducible example of what I need to to:
dat- data.frame(A=seq(1,5), B=seq(6,10))
vec.names- c(a, b)
for(i in 1:ncol(dat))
{
tab- dat[,i]-1
assign(vec.names[i], tab)
}
cbind(vec.names[1], vec.names[2])
[,1] [,2]
[1,] a b
But I was looking after the following result (using vec.names):
cbind(a,b)
a b
[1,] 0 5
[2,] 1 6
[3,] 2 7
[4,] 3 8
[5,] 4 9
Thanks in advance
Jonas
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and provide commented, minimal, self-contained, reproducible code.
[R] vector fragment
Dear R users: I have got a simple question that has been bothering me for a while. Given a certain character vector, I would like to get in a separate vector a fragment of text, in this case the 3rd and 4th letters of each element. So, if: v- c(stratosphere, mesosphere, troposphere) I want to obtain a different vector like this: c(ra, so, op) Thanks in advance for your help Jonas [[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] missing argument
Thank you all for the replies. Problem soved!
J
On 12/10/08, Bert Gunter gunter.ber...@gene.com wrote:
I believe the usual practice in this case is simply to give default values
for arguments:
function(x, y, opt.arg1 = 0, opt.arg2 = sin(1),...)
If you haven't already done so, perusal of An Introduction to R --
especially the Named Arguments and Defaults -- would be appropriate.
Cheers,
Bert Gunter
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On
Behalf Of Tony Breyal
Sent: Wednesday, December 10, 2008 1:01 PM
To: r-help@r-project.org
Subject: Re: [R] missing argument
?missing
never used it myself, but looks like it might help you :-)
Tony Breyal.
On 10 Dec, 19:09, jonas garcia garcia.jona...@googlemail.com
wrote:
Dear list,
I have a question and I'm going to give an example of my problem
f- function(d1, d2, d3)
{
d- d1*d2/d3
return(d)
}
v1- 1
v2- 2
If I try
f(v1, v2, v3)
Error in f(v1, v2, v3) : object v3 not found
I obviously got the above error message.
I would like to add something to my function to allow me to get a certain
value (say zero)
if one of the arguments is not provided (in this case v3).
Thanks in advance
J
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guidehttp://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
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and provide commented, minimal, self-contained, reproducible code.
__
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and provide commented, minimal, self-contained, reproducible code.
[R] missing argument
Dear list,
I have a question and I'm going to give an example of my problem
f- function(d1, d2, d3)
{
d- d1*d2/d3
return(d)
}
v1- 1
v2- 2
If I try
f(v1, v2, v3)
Error in f(v1, v2, v3) : object v3 not found
I obviously got the above error message.
I would like to add something to my function to allow me to get a certain
value (say zero)
if one of the arguments is not provided (in this case v3).
Thanks in advance
J
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] extract bits of a character vector
Dear list: I have the following problem: From a vector like this: vec- c(mud_1999_area_A, gravel_2004_area_F) I would like to get the year in a separate vector, such y- c(1999, 2004) I´ve been looking to grep() but I'm not sure how to do this. Help? Thanks in advance J [[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] extract bits of a character vector
Thank you all for the useful responses. Problem solved! J On Thu, Oct 23, 2008 at 12:14 AM, Duncan Murdoch [EMAIL PROTECTED]wrote: On 22/10/2008 5:02 PM, jonas garcia wrote: Dear list: I have the following problem: From a vector like this: vec- c(mud_1999_area_A, gravel_2004_area_F) I would like to get the year in a separate vector, such y- c(1999, 2004) I´ve been looking to grep() but I'm not sure how to do this. You want sub() or gsub(). For example, if the year is always the only digits in the string, then gsub([^[:digit:]], , vec) (which says delete all non-digits). Duncan Murdoch [[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.
