[R] Asking Favor For "Remove element with Particular Value In Vector"

[Bert Gunter]

Jim et. al:

This is the second time I've seen this "advice" recently. Use logical
indexing: which(), though not wrong, is superfluous:


x[ !x %in% c(0,255)]  will do, rather than:

> If you want to remove the specific values 0 and 255 from your vector, try:
>
> x<-x[-which(x %in% c(0,255))]
>
> Jim
>

-- Bert
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-- 
"Men by nature long to get on to the ultimate truths, and will often
be impatient with elementary studies or fight shy of them. If it were
possible to reach the ultimate truths without the elementary studies
usually prefixed to them, these would not be preparatory studies but
superfluous diversions."

-- Maimonides (1135-1204)

Bert Gunter
Genentech Nonclinical Biostatistics