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creating a matrix subset based on a threshold cutoff

2 messages · rich at thevillas.eclipse.co.uk, Henrique Dallazuanna

rich at thevillas.eclipse.co.uk
# 
Hi,

    I have a table of x rows and y columns. The table is huge and so i'd like
   to create a subset of the data containing rows where any of the y values are
   below a threshold, say 1e-4. Is there a simple way of doing this in R?


   thanks

   Rich
Henrique Dallazuanna
# 
You have a table or matrix?

if is matrix:

set.seed(123)
x <- matrix(rnorm(100), 10, 10)
cutoff <- -1.5
do.call(rbind, apply(x, 1, function(.x).x[any(.x < cutoff)]))

On 04/03/2008, rich at thevillas.eclipse.co.uk
<rich at thevillas.eclipse.co.uk> wrote: