You should use absolute (a ufunc) and not abs (internal python function): >>> plot(absolute(fft(b)))
Nadav. -----הודעה מקורית----- מאת: [EMAIL PROTECTED] בשם frank wang נשלח: ד 24-ספטמבר-08 08:21 אל: Discussion of Numerical Python נושא: [Numpy-discussion] performance of the numpy Hi, I am new user from matlab world. So I always compare with matlab. in my code, i have a large array with about 100000 data. when I perform c=fft(b) d=abs(c) plot(d) I got good response. however, when i try to execute: plot(abs(fft(b))) it takes forever and i have to kill the operation. In another situation, i want debug my code, so i use pdb.set_trace() to break and then execute the next command: c=fft(b) Then the python keeps running and never got out. I have to kiill it too. i posts this and hope the expert will fix this in future. Thanks for the great work. Frank _________________________________________________________________ Get more out of the Web. Learn 10 hidden secrets of Windows Live. http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008
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