Hi Karl,
both strategies are possible using gsub:
gsub("([0-9]*).*","\\1",str) #extract numbers
gsub("[^0-9]","",str) #remove all non-numeric characters
wrap it nicely in an "as.numeric" call to get numeric values.
cheers.
Am 16.09.2011 11:13, schrieb Karl Weinmayer:
> Dear all,
>
>
>
> I have a vector, which looks about like this:
>
>
>
> str <- c("14.XYZ", "15.ABCDE", "16.dkieowo", "120.EIDKAI")
>
>
>
> I need to extract the numerical characters out of the string, so I receive
> in the end a normal vector containing:
>
>
>
> vec <- c(14, 15, 16, 120)
>
>
>
> I need a generic solution for this. My actual vector contains about 403
> strings, and it is bound to change with different versions of my
> calculations. So I need something that either extracts all numeric
> characters or deletes everything else.
>
>
>
> I hope you can help me out.
>
>
>
> Best,
>
> Karl
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
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