[R] character position

[Dimitris Rizopoulos]

you could use gsub(), e.g.,

strg <- "There are 20 species in this grid"
gsub("[^0-9]", "", strg)


I hope it helps.

Best,
Dimitris


Paulo Cardoso wrote:
> Hi,
> 
> I'm not being able to capture a position of a 'string' in a character
> string.
> 
> In this example: 'There are 20 species in this grid'
> 
> I would like to capture the string (number) after 'are' and before
> 'species'. Consider they do not change. I wouldn't like to use substr
> because stop position may change.
> 
> Thanks
> 
> Paulo
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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