Re: Hardware to run Octave

[Jose Ramom Flores das Seixas]

Às 20:51 de 23/02/21, vrozos wrote:
> Your current machine configuration, though 10 year-old, is not that bad. Do
> not expect any significant improvement with a new one. You have three
> options:
>
> 1. find a more efficient algorithm for your problem,
> 2. if you have nested for-loops you cannot avoid, consider implementing them
> in C -> mex
> 3. parallelization (alas, multi-core processing is not a easy thing).
>
> BTW, if your problem involves eigenvalues, eigen-3.3.5 library does
> miracles. If you need normxcorr, I can suggest a nice solution too.

Thanks to Etienne Grossmann's tips, and after some time spent 
investigating the use of parrarrayfun, I was able to "parallelize" my 
algorithm a little more and use all 4 cores of my computer, dividing the 
calculation time by 2.8, so that now the program takes about 6 hours to 
finish.

In order to help people who may have the same difficulty in 
understanding the spartan documentation of the parallel package, I am 
attaching a file with two relatively simple examples showing how to use 
the parrarrayfun function with one and two dimensional arrays.

Surely yours

Ramom

Examples of how to use parrarrayfun.pdf
Description: Adobe PDF document