-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Torgil Svensson wrote:
> My original problem was to get an moving average and a moving standard > deviation (120k rows and N=1000). For average I guess convolve should > perform good, but is there anything smart for std()? For now I use ... > >>>> moving_std=array([a[i:i+n].std() for i in range(len(a)-n)]) > > which seems to perform quite well. You can always look for more fancy and unreadable solutions, but since this one has the inner loop with a reasonable vector length (1000) coded in C, one can guess that the performance will be reasonable. I would start looking for alternatives only if N drops significantly, say to <50. Rob - -- Rob W.W. Hooft || [EMAIL PROTECTED] || http://www.hooft.net/people/rob/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE8T/QH7J/Cv8rb3QRAtutAKCikJ1qLbedU4pNl7ZohHCLEAWVKACgji9R 6evNgk6R68/JnimUs4OOd98= =htbE -----END PGP SIGNATURE----- ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
