[R] gsub syntax help

Sarah Goslee sarah.goslee at gmail.com
Thu Feb 2 22:48:20 CET 2012

In the example you gave, all that has to be done is
replace ".sample.tif" at the end of the string with "", which
is easy.

> avec <- c("SPI1.S1.str1.P3.sample.tif", "SPI1.S1.STR2.P1.sample.tif")
> gsub("\\.sample\\.tif$", "", avec)
[1] "SPI1.S1.str1.P3" "SPI1.S1.STR2.P1"

If your real data are more complex, we need to know what they
look like.


On Thu, Feb 2, 2012 at 4:42 PM, Benjamin Caldwell
<btcaldwell at berkeley.edu> wrote:
> I have some elements in a vector with extraneous information (e.g. file
> name and sample IDs) that I'd like to strip from every element.
> For example,  I would like "SPI1.S1.str1.P3.sample.tif"
>  "SPI1.S1.STR2.P1.sample.tif" to read  "SPI1.S1.str1.P3" "SPI1.S1.STR2.P1".
> Will someone help me with the syntax in gsub? It needs to be something
> like gsub("garbage", "everything except garbage" , dataframe,), I think,
> but it's the "everything except garbage" that's giving me trouble.
> Thanks
> *Ben Caldwell*

Sarah Goslee

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