From help-octave-request at bevo dot che dot wisc dot edu Wed Aug 13 11:22:59 2003 Subject: loooooong vector difficulties From: Robert Leach To: help-octave at bevo dot che dot wisc dot edu Date: Wed, 13 Aug 2003 10:22:10 -0600 Hi, I have some data that's huge. It's a string of zeroes and ones that I want to split up into a vector as input to a wavelet transform. I'm talking 9 million elements. I have 3 of these vectors. First of all, even calling zeros(1,9000000) takes forever. I do that to initially populate a convolution kernel and then change the first and last 10 elements with taps. Even those two, ten-iteration loops take forever. Second, octave eventually chokes. Is there anything I can do to 1: improve performance so that operations it does successfully go faster 2: make octave more amenable to large data structures so it doesn't crash ? If that's not possible, then what affect on my results would splitting up the data have? Thanks, Rob ===================================================================== = Robert W. Leach = = Los Alamos National Lab = = Bioscience Division: Bioinformatics & Computational Biology Group = = MS M888 = = Los Alamos, NM 87545 = = robleach at lanl dot gov = = 505-667-2307 = ===================================================================== Work Calendar & To-Do List: http://66.93.220.190/phpicalendar/week.php?cal=Work ------------------------------------------------------------- Octave is freely available under the terms of the GNU GPL. Octave's home on the web: http://www.octave.org How to fund new projects: http://www.octave.org/funding.html Subscription information: http://www.octave.org/archive.html -------------------------------------------------------------