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How to iron in Octave?

I'm trying to get some of the MATLAB code to work in Octave and I came up with the line:

xsm = smooth(x,0.03,'loess')

which doesn't seem to have an octave equivalent. x is just an array of several thousand real numbers.

Is there any Octave code that will do this for me, and if not, where can I find an algorithm so I can write my own? And if I do, how do I contribute to Octave?

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Here is some loess code in Excel Basic that can be run:



http://peltiertech.com/WordPress/loess-smoothing-in-excel/

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It looks like someone has already implemented it: smooth.m or maybe the data smoothing package in Octave-Forge



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