Re: [R] renaming column names

2009-05-31 Thread Benny Chain
m: David Winsemius [mailto:dwinsem...@comcast.net] Sent: 31 May 2009 17:11 To: Benny Chain Cc: r-help@r-project.org Subject: Re: [R] renaming column names Cannot reproduce with a toy example: > data <- data.frame(a=1:3, b=4:6, c=6:8) > colnames(data) <- c("d","e",&q

[R] renaming column names

2009-05-31 Thread Benny Chain
olnames(data) I get the same set of names as before, so the assignment doesnt seem to have worked. Any ideas or suggestions gratefully received. Benny Chain Benjamin Chain Division of Infection and Immunity Windeyer Building UCL, 46 Cleveland St. London W1T 4JF

[R] covariance

2009-04-19 Thread Benny Chain
Does anyone know a way to calculate the covariances between two arrays/matrices x and y, row by row. i.e. var(x[n,],y[n,]) for all n ? Benjamin Chain Division of Infection and Immunity Windeyer Building UCL, 46 Cleveland St. London W1T 4JF Fax 00 44 20 7679 9301 __