[R] element wise conditional assignment in r

[yunjiangster]

 Phil,
  That's very elegant, and certainly solves my problem. But in order to
assign the value to v, I would do v=ifelse(r==1,v-1,v). Is it possible to do
the assignment inside the conditional? That way I can save some running time
of assigning v to itself. Thanks for your solution!

  Sincerely,
  John
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