Better use with gsub
On Fri, Aug 1, 2014 at 10:46 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
Harold
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]))
library(gsubfn) strapply(xx, "\\d+", as.numeric, simplify = TRUE)
[,1] [,2] [,3] [,4] [,5] [,6] [1,] 24 24 24 24 24 24 [2,] 57 86 119 129 138 163
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