One way to do it is with mapply:
mydf =
data.frame(image=c('http://$IMAGE_ID$','$IMAGE_ID$'),pattern=c('www.url.com/image.jpg','http://www.blah.com/image.gif'))
mydf$url = mapply(sub,"\\$IMAGE_ID\\$",mydf$pattern,mydf$image)
mydf
image pattern url
1 http://$IMAGE_ID$ www.url.com/image.jpg http://www.url.com/image.jpg
2 $IMAGE_ID$ http://www.blah.com/image.gif http://www.blah.com/image.gif
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Wed, 8 Sep 2010, jlemaitre wrote:
I have a data frame with two columns:
image pattern
1 http://$IMAGE_ID$ www.url.com/image.jpg
2 $IMAGE_ID$ http://www.blah.com/image.gif
...
I want to replace "$IMAGE_ID$" with the corresponding entry in the pattern
column such that the result would appear as follows:
url
http://www.url.com/image.jpg
http://www.blah.com/image.gif
Using something like > gsub("\\$IMAGE\\_ID\\$",image,pattern) doesn't work
because it only takes uses the first entry in "pattern" as the replacement
for all "image" entries:
url
http://www.url.com/image.jpg
www.url.com/image.jpg
Please help.
Thanks.
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