[R] element wise pattern recognition and string substitution

[Jeff Newmiller]

Your opening assertion is false. 

Provide a reproducible example and someone will demonstrate. 
-- 
Sent from my phone. Please excuse my brevity.

On September 4, 2016 9:06:59 PM PDT, Jun Shen <jun.shen.ut at gmail.com> wrote:
>Dear list,
>
>I have a vector of strings that cannot be described by one pattern. So
>let's say I construct a vector of patterns in the same length as the
>vector
>of strings, can I do the element wise pattern recognition and string
>substitution.
>
>For example,
>
>pattern1 <- "([^.]*)\\.([^.]*\\.[^.]*)\\.(.*)"
>pattern2 <- "([^.]*)\\.([^.]*)\\.(.*)"
>
>patterns <- c(pattern1,pattern2)
>strings <- c('TX.WT.CUT.mean','mg.tx.cv')
>
>Say I want to extract "WT.CUT" from the first string and "tx" from the
>second string. If I do
>
>sub(patterns, '\\2', strings), only the first pattern will be used.
>
>looping the patterns doesn't work the way I want. Appreciate any
>comments.
>Thanks.
>
>Jun
>
>	[[alternative HTML version deleted]]
>
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