Re: substitute a floating point number with it's double (or multiple)

Uday K2 wrote:
> Hi,
>
> I have a file which has lines like this.
>
> area : 37.24;
> power : 1.28, 2.73, 3.84;
>
> I need to substitute each number with it's double (number*2).
> Is there anyway I can do this in VIM?
> I don't have perldo command in my version of VIM.
>
%s/[0-9.]\+/\=2.0*str2float(submatch(0))/g

-from-

[0-9.]\+ one or more digits or periods

-to-

\= ... evaluate following expression
2.0 ... obvious
* ... also obvious
str2float(submatch(0)) take entire match and convert that string to a float

/g ... as many matches as possible per line

HTH,
Chip Campbell

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