character position

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

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

I hope it helps.

Best,
Dimitris
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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character position

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