[R] Better use with gsub

arun smartpink111 at yahoo.com
Fri Aug 1 16:59:55 CEST 2014

You could try:
simplify2array(str_extract_all(xx, perl('(?<=[A-Z]|\\:)\\d+')))
     [,1] [,2] [,3]  [,4]  [,5]  [,6] 
[1,] "24" "24" "24"  "24"  "24"  "24" 
[2,] "57" "86" "119" "129" "138" "163"

On Friday, August 1, 2014 10:49 AM, "Doran, Harold" <HDoran at air.org> wrote:
I have done an embarrassingly bad job using a mixture of gsub and strsplit to solve a problem. Below is sample code showing what I have to start with (the vector xx) and I want to end up with two vectors x and y that contain only the digits found in xx.

Any regex users with advice most welcome


xx <- c("S24:57",   "S24:86",   "S24:119",  "S24:129",  "S24:138",  "S24:163")
yy <- gsub("S","\\1", xx)
a1 <- gsub(":"," ", yy)
a2 <- sapply(a1, function(x) strsplit(x, ' '))
x <- as.numeric(sapply(a2, function(x) x[1]))
y <- as.numeric(sapply(a2, function(x) x[2]))

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