I am a novice user of R and am stumbling on how to order a dataset produced during my session. I have a 1863 row X 14 column dataset that I want to put out to a file. I want the output sorted by the first column and then by the second column both in ascending order. The first column is character and the second is numeric (I hope). I used an "as.numeric" function to assign that variable. Is there a reason R would not accept "0" or "00" as a numeric value? I have tried using the order function but the examples I have seen don't seem to translate for me. I tried something like this assuming my dataset is called "data". datanew<-data[order(var1, var2),] print(datanew) This generates an "incorrect number of dimensions" error in the order function. I also tried listing all the variables in the parentheses. Your help is appreciated.
Sorting a data set
3 messages · tony.anderson, jim holtman, arun
If you want to sort by the columns with the names 'var1' and 'var2', you would do: newdata <- data[order(data$var1, data$var2), ]
On Wed, May 30, 2012 at 6:07 PM, tony.anderson <tony.anderson at noaa.gov> wrote:
I am a novice user of R and am stumbling on how to order a dataset produced during my session. I have a 1863 row X 14 column dataset that I want to put out to a file. ?I want the output sorted by the first column and then by the second column both in ascending order. ?The first column is character and the second is numeric (I hope). ?I used an "as.numeric" function to assign that variable. ?Is there a reason R would not accept "0" or "00" as a numeric value? I have tried using the order function but the examples I have seen don't seem to translate for me. ?I tried something like this assuming my dataset is called "data". datanew<-data[order(var1, var2),] print(datanew) This generates an "incorrect number of dimensions" ?error in the order function. ?I also tried listing all the variables in the parentheses. Your help is appreciated.
______________________________________________ R-help at 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.
Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
Hi Tony,
Try this:
dataT<-data.frame(Var1=rep(c("Sole","Lack","ABD","Zad"),rep(5,4)), Var2=rnorm(20,0.5),Var3=runif(20,0.4))
?dataT1<-dataT[with(dataT,order(Var1,Var2,Var3)),]
dataT1
? Var1??????? Var2????? Var3
12? ABD -0.19842353 0.4333720
13? ABD? 0.14050814 0.9194297
11? ABD? 1.07544531 0.4539302
14? ABD? 1.17039127 0.7840392
15? ABD? 1.23533897 0.5105670
6? Lack -0.14460512 0.7106342
10 Lack? 0.36935316 0.6118821
9? Lack? 0.62868056 0.5915753
-----------------------------------------------
A.K.
----- Original Message -----
From: tony.anderson <tony.anderson at noaa.gov>
To: r-help at r-project.org
Cc:
Sent: Wednesday, May 30, 2012 6:07 PM
Subject: [R] Sorting a data set
I am a novice user of R and am stumbling on how to order a dataset produced during my session.
I have a 1863 row X 14 column dataset that I want to put out to a file.? I want the output sorted by the first column and then by the second column both in ascending order.? The first column is character and the second is numeric (I hope).? I used an "as.numeric" function to assign that variable.? Is there a reason R would not accept "0" or "00" as a numeric value?
I have tried using the order function but the examples I have seen don't seem to translate for me.? I tried something like this assuming my dataset is called "data".
datanew<-data[order(var1, var2),]
print(datanew)
This generates an "incorrect number of dimensions"? error in the order function.? I also tried listing all the variables in the parentheses.
Your help is appreciated.
______________________________________________
R-help at 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.