advanced number recognition in strings?

[s.schmeier at gmail.com]

Hi everybody,

we want extract numbers from strings and wonder if there is already a
module around for doing this. An example in our case would look like
this:

0.032 +/- 0.5 x 10(-4)

it would even be helpful to have a routine which does not recognise the
+/- , but at least the 10(-4).

Thank you for your help.

Sebastian