[R] Viewing specific data from a dataframe

Peter Ehlers ehlers at ucalgary.ca
Tue Oct 6 16:32:57 CEST 2009


If I understand correctly, you can use which( ,arr.ind=TRUE):

Assuming that you start with a data frame,

  dat <- as.data.frame(matrix(runif(30), ncol=5))
  nm <- names(dat)
  cormat <- cor(dat)
  cormat[lower.tri(cormat, diag=TRUE)] <- NA
  idx <- which(cormat > 0.4, arr.ind=TRUE)
  idx
  cbind(nm[idx[, "row"]], nm[idx[, "col"]])

will give you the pairs.

  -Peter Ehlers

Krystyna Golabek wrote:
> Dear R users,
> 
> Simple question. Can anyone help with the code that would allow me to view only the variables who's correlation output is >0.8? 
> 
> This is the code I'm using to date
>> cor(data, method="spearman")
> 
> Kind regards
> Krys
> 
> 
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