How to make a Gaussian Fit?

Xcal

Anyone knows how to make a Gaussian fit to a histogram data using Python, or
where I can find a library that helps me in this task?

Tks everyone...

Paxcal

Jul 18 '05 #1

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8826

Terry Reedy

"Xcal" <pa******@sapo.pt> wrote in message
news:40***********************@news.telepac.pt...

Anyone knows how to make a Gaussian fit to a histogram data using Python, or where I can find a library that helps me in this task?

The standard way to fit Guassian distributions to data is to match mean and
standard deviation. Take a look in some statistics texts.

TJR

Jul 18 '05 #2

Carl

Xcal wrote:

Anyone knows how to make a Gaussian fit to a histogram data using Python,
or where I can find a library that helps me in this task?

Tks everyone...

Paxcal

Install the Numeric module, then

import MLab
a = range(10)
mean = MLab.mean(a) 4.5 standard_deviation = MLab.std(a)

3.0276503540974917

Carl

Jul 18 '05 #3

Jeremy Yallop

Xcal wrote:

Anyone knows how to make a Gaussian fit [...]

Put it on a mean exercise program and don't allow any deviation.

Jul 18 '05 #4

Will Henney

"Xcal" <pa******@sapo.pt> wrote in message news:<40***********************@news.telepac.pt>.. .

Anyone knows how to make a Gaussian fit to a histogram data using Python, or
where I can find a library that helps me in this task?

This is a special case of non-linear fitting, which you can do with
the modules in ScientificPython. See
http://starship.python.net/~hinsen/ScientificPython/

Here is an extract from the relevant docs...

-----------------------------------------------------------------------
Module Scientific.Functions.LeastSquares
Functions

* leastSquaresFit()

General non-linear least-squares fit using the
Levenberg-Marquardt algorithm and automatic derivatives.
....
-----------------------------------------------------------------------

Cheers

Will

Jul 18 '05 #5

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