[R] Extracting Numeric Columns from Data Fram

2013-02-17 Thread Henrik Pärn
Dear Barry, I saw that you received several nice answers on how to 'pull out' numeric columns. You also wrote that an alternative could be to 'just operate only on' numerics. Here is one possibility: library(plyr) # some dummy data df <- data.frame(nonnum1 = letters[1:5], num1 = 1:5, nonnum2

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread arun
7851 #5  0.4880163    2 0.4474437 #6 -1.2553858    2 0.9646670 A.K. - Original Message - From: Barry DeCicco To: "r-help@R-project.org" Cc: Sent: Saturday, February 16, 2013 1:15 PM Subject: [R] Extracting Numeric Columns from Data Fram Hello, I've got a data frame wit

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread Barry DeCicco
Thanks to all who responded! I've taken those responses, and found out what works: myNumericColumns<-mydataframe[sapply(mydataframe, is.numeric)] produces a subset of columns with just the numeric vectors. Sincerely, Barry [[alternative HTML version deleted]] __

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread Rui Barradas
Hello, You should provide us with a data example, like the posting guide says. Anyway, see the following example. # make up some data dat <- data.frame(X = 1:4, Y = rnorm(4), Z = letters[1:4]) str(dat) # this returns the numeric/integer columns dat[sapply(dat, is.numeric)] Hope this helps, Ru

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread John Kane
http://stackoverflow.com/questions/5863097/selecting-only-numeric-columns-from-a-data-frame John Kane Kingston ON Canada > -Original Message- > From: bdecicco2...@yahoo.com > Sent: Sat, 16 Feb 2013 10:15:35 -0800 (PST) > To: r-help@r-project.org > Subject: [R] Extracting

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread Phil Spector
Barry = Suppose your data frame is called "mydat". Then something like mydat[,sapply(mydat,class) %in% c('numeric','integer')] might do what you want. - Phil On Sat, 16 Feb 2013, Barry DeCicco wrote: Hello, I've got a data frame wi

Re: [R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread Marc Schwartz
On Feb 16, 2013, at 12:15 PM, Barry DeCicco wrote: > Hello, > > I've got a data frame with a mix of numeric, integer and factor columns. > I'd like to pull out (or just operate only on) the numeric/integer columns. > Every thing I've found in searches is about how to subset by rows, > or how to

[R] Extracting Numeric Columns from Data Fram

2013-02-16 Thread Barry DeCicco
Hello, I've got a data frame with a mix of numeric, integer and factor columns. I'd like to pull out (or just operate only on) the numeric/integer columns. Every thing I've found in searches is about how to subset by rows, or how to operate assuming you have the column names.  I'd like to pull by