FFT Multiplication (HP48G/GX/G+)

02112014, 03:34 PM
Post: #4




RE: FFT Multiplication (HP48G/GX/G+)
(02112014 09:04 AM)Raymond Del Tondo Wrote: Hi, Thanks for your tips! I'd rather use vectors only, but lists are more convenient for certain tasks (or I just don't know how to do them using vectors). (02112014 09:04 AM)Raymond Del Tondo Wrote: I didn't dive into the code too deeply, but I'm sure the functionality can be made faster on an HP 48GX than any code giving the same results on an HP71B;) I was disappointed with the HP48GX, but now I see I can blame it on my sloppy adaptation. It surely can do better than this: # Groups Digits (results) Time 71B Time 48GX 16 128 24.11 14.39 32 256 53.41 40.95 64 512 116.74 199.96 Also, I suspect the performance decrease as the number of digits grow is due to lack of memory, as I have only 12 K left (and only one HP48GX). Regards, Gerson. 

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