R help - Dec 2015 - assigning values to elements of matrixes

I think this may help.

my_assign <- function(operand, value) {
  assignment <- paste(operand, value, sep = "<-")
  e <- parse(text = assignment)
  eval.parent(e)
}

a <- rep(0,5)
> a
[1] 0 0 0 0 0

my_assign("a[2]", 7)
> a
[1] 0 7 0 0 0

my_assign("a[4]", 12)
> a
[1] 0 7 0 12 0


--
GG

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