# [PYTHON MATRIX-SIG] Applying a general function to an array

**Konrad HINSEN
**
hinsenk@ere.umontreal.ca

*Thu, 22 Feb 1996 13:24:27 -0500*

Is it possible to apply a general python function (that takes one
input and produces one output to an array? For example, I'd like to
have a python function (implemented in C), "y = f(x)" and then be able
to say Y = f(X) and get Y set to an array where each element in Y is f
applied to the corresponding element in X.
There is no real support for this right now. It has to be added, and I
am trying to make such things part of my function set proposal
(progressingly slowly due to lots of other work). If your function f
is written in terms of functions from umath, then it should work
automatically, but in the case of a C function or a more complicated
Python function (with tests, loops, etc.), you have no other way than
to write explicit for-loops or some messy map() application.
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Konrad Hinsen | E-Mail: hinsenk@ere.umontreal.ca
Departement de chimie | Tel.: +1-514-343-6111 ext. 3953
Universite de Montreal | Fax: +1-514-343-7586
C.P. 6128, succ. Centre-Ville | Deutsch/Esperanto/English/Nederlands/
Montreal (QC) H3C 3J7 | Francais (phase experimentale)
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