fast value replacement in (numeric) vector
yes, yes! I'm out of my mind. Thank you. -----Original Message----- From: hadley wickham [mailto:h.wickham at gmail.com] Sent: Saturday, September 20, 2008 5:49 PM To: Ling, Gary (Electronic Trading) Cc: r-help at r-project.org Subject: Re: [R] fast value replacement in (numeric) vector On Sat, Sep 20, 2008 at 4:41 PM, Ling, Gary (Electronic Trading)
<Gary_Ling at ml.com> wrote:
Hi R users, What is the fastest way to replace a(some) value(s) in a (numeric) vector? I checked ?replace, but its output is another vector. 1) I wonder if there's any function to perform in-place replacement? 2) Or any other function would do what I'm looking for with faster speed? # here is something I tried in R: n <- 100000 L <- 1:n
L[1] <- 0 L[n] <- 0 L[c(1, n)] <- 0 ? Hadley
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