That's correct? I have this equationn m = 25+5log10(x) In python i did so: 25 + (5 * math.log10(x) Is correct? Thanks, Waléria. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.scipy.org/pipermail/scipy-user/attachments/20101122/376cc8cd/attachment.html>