Re: [Gretl-users] Mahalanobis Distance - Execution Time

Hi again, Sorry about the confusion. I that sentence 1 sample = 1 observation. What I've basically done is execute the code a couple million times (since I'm working with music files) to make sure that the average execution time is as accurate as possible. So my original graph indicates the average time it took to execute the code with 1 observation in the data set, then 2 observations , 3 observations, until 250 observations (with the jump occurring between 199 and 200 observations). I've attached a small example program (with a makefile) that does the test. I'm using gettimeofday, which will probably only work under Linux. It might take a couple of seconds to execute. I would apprciate it if someone could run it (sorry Allin, this is probably the wrong mailing list again for posting C code), and verify that I'm not the only one with this time-jump. These are my outputs: /197 number of observations: 784814// //198 number of observations: 760379// //199 number of observations: 759822// //200 number of observations: 598327// //201 number of observations: 602174// //202 number of observations: 604390// //203 number of observations: 607213// / Chris On 2014/04/15 04:55 PM, Riccardo (Jack) Lucchetti wrote: