Re: [R] replacing a value
Hi Ani, It seems to work for me: a<-c(20, 20, 14.2375646029948, 19.9, 20, 20, 16.3092078677214, 20, 20, 20, 20, 20, 20, 20, 20, 14.8590932408795, 16.178935255298, 20, 20, 20, 20, 27.6404077886079, 20, 20, 20, 20, 20, 21.9857063037444, 20, 20, 20, 20) > a==20 [1] TRUE TRUE FALSE FALSE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE [13] TRUE TRUE TRUE FALSE FALSE TRUE TRUE TRUE TRUE FALSE TRUE TRUE [25] TRUE TRUE TRUE FALSE TRUE TRUE TRUE TRUE > a[a==20]<-0 > a [1] 0.0 0.0 14.23756 20.0 0.0 0.0 16.30921 0.0 [9] 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14.85909 [17] 16.17894 0.0 0.0 0.0 0.0 27.64041 0.0 0.0 [25] 0.0 0.0 0.0 21.98571 0.0 0.0 0.0 0.0 Notice that it didn't make 19.99 equal to 20, but did round it up when printing the result. How do you know that it failed? Jim On Wed, Apr 6, 2022 at 12:48 PM ani jaya wrote: > > Dear R-Help, > > I try to change a specific value here by following these: > > https://www.journaldev.com/39695/replace-in-r > https://stackoverflow.com/questions/5824173/replace-a-value-in-a-data-frame-based-on-a-conditional-if-statement > https://stackoverflow.com/questions/54615462/how-to-replace-certain-values-in-a-specific-rows-and-columns-with-na-in-r > ..and many more > > however, it is not change anything. I believe it "should" be easy but > I think I am missing something. I am afraid it is my system that has a > problem but restarting r is not solve the problem. > I just want to change 20 to 0 in my data. > > > dput(a) > c(20, 20, 14.2375646029948, 19.9, 20, 20, 16.3092078677214, > 20, 20, 20, 20, 20, 20, 20, 20, 14.8590932408795, 16.178935255298, > 20, 20, 20, 20, 27.6404077886079, 20, 20, 20, 20, 20, 21.9857063037444, > 20, 20, 20, 20) > > what I did: > a[a==20]<-0 #fail > a<-replace(a,a==20,0) #fail > a[which(a==20)]<-0 #fail > > > sessionInfo() > R version 4.1.2 (2021-11-01) > Platform: x86_64-w64-mingw32/x64 (64-bit) > Running under: Windows 10 x64 (build 19043) > > Matrix products: default > > locale: > [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 > [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C > [5] LC_TIME=English_United States.1252 > system code page: 949 > > Best, > Ani > > __ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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] Replacing cretin value in a file
Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 ##worked well and values heve been calculated e[e == 528.8933] - -## no changes made to 528.8933 any suggestions please -- View this message in context: http://r.789695.n4.nabble.com/Replacing-cretin-value-in-a-file-tp4629840.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.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing cretin value in a file
FAQ 7.31 Sent from my iPad On May 13, 2012, at 7:52, Jonsson amen.alya...@bordeaux.inra.fr wrote: Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 ##worked well and values heve been calculated e[e == 528.8933] - -## no changes made to 528.8933 any suggestions please -- View this message in context: http://r.789695.n4.nabble.com/Replacing-cretin-value-in-a-file-tp4629840.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.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] Replacing cretin value in a file
Dear Jim, You may forget to add your suggestions because what I see is just my post -- View this message in context: http://r.789695.n4.nabble.com/Replacing-cretin-value-in-a-file-tp4629840p4629843.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.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing cretin value in a file
On May 13, 2012, at 8:12 AM, Jonsson wrote: Dear Jim, You may forget to add your suggestions because what I see is just my post The suggestion was to read the referenced FAQ. PLEASE do read the posting guide http://www.R-project.org/posting-guide.html And while you are referencing the FAQ from the R help pages, you might also follow the link and read the Posting Guide. It will explain why including context is requested. Most people do not want to use Nabble and many of us somewhat annoyed that Nabble users seem to expect us to use it. -- David Winsemius, MD 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] Replacing cretin value in a file
Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 This code given above would read a binary file . Then It would do some clculations to e. That worked well. I opend the file again in order to look at the resultsand I found weird numbers ( 528.8933). I then used this line e[e == 528.8933] - -to replace the value of 528.8933 by -. I got no errors but when I looked again at the values, I found them as they were(528.8933 is still there) any idea on how to replace a value by another value?Thanks in advance -- View this message in context: http://r.789695.n4.nabble.com/Replacing-cretin-value-in-a-file-tp4629840p4629846.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.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing cretin value in a file
On May 13, 2012, at 9:08 AM, Jonsson wrote: Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 This code given above would read a binary file . Then It would do some clculations to e. That worked well. I opend the file again in order to look at the resultsand I found weird numbers ( 528.8933). I then used this line e[e == 528.8933] - -to replace the value of 528.8933 by -. I got no errors but when I looked again at the values, I found them as they were(528.8933 is still there) any idea on how to replace a value by another value?Thanks in advance From memory ... since you have not yet learned to include context. You were advised to read the FAQ ... item 7.31. Perhaps this example will help. x - 7* round(528.8933/7, 6) x== 528.8933 [1] FALSE x [1] 528.8933 PLEASE do read the posting guide http://www.R-project.org/posting-guide.html -- David Winsemius, MD 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] Replacing cretin value in a file
On 13-05-2012, at 15:08, Jonsson wrote: Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 This code given above would read a binary file . Then It would do some clculations to e. That worked well. I opend the file again in order to look at the resultsand I found weird numbers ( 528.8933). I then used this line e[e == 528.8933] - -to replace the value of 528.8933 by -. I got no errors but when I looked again at the values, I found them as they were(528.8933 is still there) any idea on how to replace a value by another value?Thanks in advance Please read the R FAQ section 7.31 Why doesn't R think these numbers are equal? http://cran.r-project.org/faqs.html http://cran.r-project.org/doc/FAQ/R-FAQ.html Berend __ 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] Replacing cretin value in a file
Perhaps you are in the first circle of the R Inferno? Ken Hutchison On May 13, 2012, at 9:31 AM, Berend Hasselman b...@xs4all.nl wrote: On 13-05-2012, at 15:08, Jonsson wrote: Dear All, I am trying to replace a value of 528.8933 to - in my file t- file(C:\\Users\\Amin\\Desktop\\1999n_Resample11.img, rb) e=readBin(t, double(), size=4,n=720*360, signed=TRUE) e[e != -] - e[e != -]*0.0099 + 477.65 -273.15 This code given above would read a binary file . Then It would do some clculations to e. That worked well. I opend the file again in order to look at the resultsand I found weird numbers ( 528.8933). I then used this line e[e == 528.8933] - -to replace the value of 528.8933 by -. I got no errors but when I looked again at the values, I found them as they were(528.8933 is still there) any idea on how to replace a value by another value?Thanks in advance Please read the R FAQ section 7.31 Why doesn't R think these numbers are equal? http://cran.r-project.org/faqs.html http://cran.r-project.org/doc/FAQ/R-FAQ.html Berend __ 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.
[R] Replacing a value in a dataframe
hi I have data like this in a dataframe Var Value Cheque X140FALSE X220FALSE X328TRUE I want to replace it FLASE with 0 and TRUE with 1. is there any method by which i can do without using LOOP -- View this message in context: http://r.789695.n4.nabble.com/Replacing-a-value-in-a-dataframe-tp4122188p4122188.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.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing a value in a dataframe
On 30.11.2011 09:16, arunkumar wrote: hi I have data like this in a dataframe Var Value Cheque X140FALSE X220FALSE X328TRUE I want to replace it FLASE with 0 and TRUE with 1. is there any method by which i can do without using LOOP dataframe$Cheque - as.integer(Cheque) Uwe Ligges -- View this message in context: http://r.789695.n4.nabble.com/Replacing-a-value-in-a-dataframe-tp4122188p4122188.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing a value in a dataframe
er... Uwe, shouldn't that be, e.g. dataframe$Cheque - as.integer(dataframe$Cheque) ## or building on Rolf's suggestion dataframe - within(dataframe, Cheque - as.integer(Cheque)) While I am at it, is there any practical difference in efficiency between these two approaches? -- Bert 2011/11/30 Uwe Ligges lig...@statistik.tu-dortmund.de: On 30.11.2011 09:16, arunkumar wrote: hi I have data like this in a dataframe Var Value Cheque X1 40 FALSE X2 20 FALSE X3 28 TRUE I want to replace it FLASE with 0 and TRUE with 1. is there any method by which i can do without using LOOP dataframe$Cheque - as.integer(Cheque) Uwe Ligges -- View this message in context: http://r.789695.n4.nabble.com/Replacing-a-value-in-a-dataframe-tp4122188p4122188.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.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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm __ 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] Replacing a value in a dataframe
On 30.11.2011 12:26, Bert Gunter wrote:
er... Uwe, shouldn't that be, e.g.
dataframe$Cheque- as.integer(dataframe$Cheque)
Sure, thanks.
## or building on Rolf's suggestion
dataframe- within(dataframe, Cheque- as.integer(Cheque))
While I am at it, is there any practical difference in efficiency
between these two approaches?
Well, just profile it. The latter has some overhead, of course:
d - data.frame(a=c(TRUE, FALSE))
system.time(for(i in 1:1e4) {d - data.frame(a=c(TRUE, FALSE)); d$a -
as.integer(d$a)})
system.time(for(i in 1:1e4) {d - data.frame(a=c(TRUE, FALSE)); d -
within(d, a - as.integer(a))})
Uwe Ligges
-- Bert
2011/11/30 Uwe Liggeslig...@statistik.tu-dortmund.de:
On 30.11.2011 09:16, arunkumar wrote:
hi
I have data like this in a dataframe
Var Value Cheque
X140FALSE
X220FALSE
X328TRUE
I want to replace it FLASE with 0 and TRUE with 1.
is there any method by which i can do without using LOOP
dataframe$Cheque- as.integer(Cheque)
Uwe Ligges
--
View this message in context:
http://r.789695.n4.nabble.com/Replacing-a-value-in-a-dataframe-tp4122188p4122188.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.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.
__
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.
