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]))
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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 -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com
You could try:
library(stringr)
?
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"
A.K.
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
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]))
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On Aug 1, 2014, at 9:46 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]))If a matrix is a satisfactory result, rather than two separate vectors:> sapply(strsplit(gsub("S", "", xx), xx, split = ":"), as.numeric)[,1] [,2] [,3] [,4] [,5] [,6] [1,] 24 24 24 24 24 24 [2,] 57 86 119 129 138 163 Regards, Marc Schwartz
How about:
x <- as.numeric(sub("^S([0-9]+):([0-9]+)$", "\\1", xx))
y <- as.numeric(sub("^S([0-9]+):([0-9]+)$", "\\2", xx))
2014-08-01 16:46 GMT+02:00 Doran, Harold <HDoran@air.org>:
> 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]))
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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