I'm wondering how the MARS algorithm decides on the specific values for the knots which are included in the hinge functions. Thank you very much.
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Read the original paper https://projecteuclid.org/download/pdf_1/euclid.aos/1176347963 . Various implementations over the years have their own tweaks. You can also look at "Restructuring Forward Step of MARS Algorithm Using a New Knot Selection Procedure Based on a Mapping Approach" https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiO5ozP8afMAhVDFz4KHVzzAXIQFggdMAA&url=http%3A%2F%2Fsc.iam.metu.edu.tr%2FiamWarehouse%2Fiam_Bibliography%2Fweb%2Findex.php%2Fattachments%2Fsingle%2F227&usg=AFQjCNH6ls0JaHkicPGBYdlESbQXRKxb3Q&sig2=GZSQ7e5MpsPlSzM1vGYnGw – Mark L. Stone Apr 24 '16 at 18:50
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Much appreciated! – Daniel Apr 25 '16 at 10:40
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@MarkL.Stone I can't find a version of the second paper that isn't behind a paywall. Is there any other literature on this subject? – dshin Jun 28 '17 at 21:46
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First paper, http://projecteuclid.org/euclid.aos/1176347963 is the original in the "field" and it's free for everyone "Full-text: Open access" pdf is directly at http://projecteuclid.org/download/pdf_1/euclid.aos/1176347963 . Yes, 2nd link is behind a paywall now - I think I provided a link which wasn't behind a paywall, but that link is no longer valid. I don't have it myself. – Mark L. Stone Jun 28 '17 at 22:00