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Very nice work.
Where can I find the mentioned functions sgsf2d.m and 2sgdf2d.m.I've couldn't make it work with the coeficients generated by the sgolay function.
It was tagged as "companion software" by the author, but no link to a book or other package was provided. What is the book or other package to which this is the companion?
Very good. The function spectgray calls getcolormap that cannot be found in MATLAB Central or elsewhere in the web.
Can the program be applied for deviated wells?