[R] how to speed up this for loop?

From: Rheannon <rbrooks_at_uvic.ca>
Date: Mon, 21 Jul 2008 16:24:05 -0700 (PDT)

Could anyone tell me a better way to achieve the output of this for loop? It seems to run quite slow. I'm sure there must be a more consise way to sum from FN to LN, excluding positive values, for each row.

#sum between FN and LN, excluding positive values for(i in 1:R){
for(j in FN[i]:LN[i]){
sum[i] <- sum[i] + sum(Temp[i,j])}}


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Received on Tue 22 Jul 2008 - 08:46:25 GMT

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