Re: proposal for new m-file function

[Carlo de Falco]

2012/3/22 <address@hidden>

Message: 2
Date: Wed, 21 Mar 2012 20:33:01 -0400
From: Ben Abbott <address@hidden>
To: octave maintainers mailing list <address@hidden>
Subject: proposal for new m-file function
Message-ID: <address@hidden>
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A user's question about fixed points piecewise-linear fitting led to the development of a function looks to be a good fit for Octave's core.

       https://mailman.cae.wisc.edu/pipermail/help-octave/2012-March/050900.html

The idea was to fit a piece-wise polynomial to a set of data. After some discussion between myself and Martin Helm, the attached ppfit.m was produced. The name was chosen to match the existing ppval().

The function provides a least-squares fit of a 1D interpolation with specified break positions to a set of data.

Demos and tests are included.

Any concern about adding this to Octave's core ?

Ben

googling for the name 'ppfit' I found this function:

https://www.assembla.com/code/zaxxon_scripts/subversion/nodes/trunk/project/scripts/ppfit.m


which seems to do the same as yours with the additional option of returning a spline with N continuous derivatives
Would it be possible to add that option to your code? 
The license of the linked function looks like BSD so it should be no problem to get the code from there.

c.