command similar to colSums for rowSums?
Does this max(apply(yourArray, 3, rowSums)) give you what you want? -Peter Ehlers
Will Carr wrote:
Working with an NxMxO sized matrix, currently I can do this in my code:
if (max(colSums(array)) >= number)
But to get an equivalent result using rowSums, I have to do:
for (i in 1:10)
{
if (max(rowSums(array[,,i])) >= number)
}
I'm running both in a much larger loop that loops millions of times, so
speed and such is quite a big factor for me. Currently, the colSums line
uses about 1/10th as much time as the rowSums' for loop, and the for loop
actually took as much time as the rest of my code combined took to execute.
Is there a faster way than using a for loop and rowSums?