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funcexample
2011 Nov 21
0
In-place modification of a matrix
...hin a new environment.
Thanks,
Simon
# example 1 - fast and doesn't create copies
rm(list=ls())
main <- function() {
matrix1 <- matrix(1.0, nrow=60000, ncol=200)
if (sum(matrix1) == 12000000) { print ("OK") } else { print ("NOT
OK") }
funcExample <- function() eval.parent(substitute({
print(paste("Mem1", memory.size()))
for (i in 1:30) {
eval(parse(text="temp <- matrix1[10,]"))
eval(parse(text="matrix1[10,] <- temp * 0"))...