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From: | Marco Caliari |
Subject: | Re: normalized ALF (Assotiated Legendre Function) |
Date: | Wed, 13 Feb 2008 12:47:55 +0100 (CET) |
Hi Ben. This one still gives problems legendre(151,0) with an Inf. I would check the line scale = -scale * (2*m-1); and try to prevent that scale becomes Inf.Moreover, I don't understand the limit 255 on n. With the normalizations, there are no problems for n>255.
Best regards, Marco On Tue, 12 Feb 2008, Ben Abbott wrote:
I've added a check for underflow. This is my first time doing such, so I may be quite off on what is commonly accepted as proper.The method I used detects an underflow for orders greater than 151. octave:104> result_octave1 = legendre (152, [-1:0.1:1]); warning: legendre: results may be unstable for high orders. I've attached the script. Ben
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