On 22/04/2009, at 8:34 AM, Crosby, Jacy R wrote:
How can I delete both rows and columns that do not meet a
particular cut off value.
Example:
d <- rbind(c(0, 1, 6, 4),
+ c(2, 5, 7, 5),
+ c(3, 6, 1, 6),
+ c(4, 4, 4, 4))
f <- as.matrix(d)
f
[,1] [,2] [,3] [,4]
[1,] 0 1 6 4
[2,] 2 5 7 5
[3,] 3 6 1 6
[4,] 4 4 4 4
I would like to delete all rows and columns that do not contain at
least one element with a value less than 1.
Apparently you actually want ``less than or equal to 1''.
So I'd end up with:
f
[,1] [,2] [,3]
[1,] 0 1 6
[3,] 3 6 1
Note: 1 is an arbitrary cut-off value.
d[apply(d,1,function(x){any(x<=1)}),apply(d,2,function(x){any(x<=1)})]
cheers,
Rolf Turner
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