Le 30/04/2019 à 08:44, Carrico, Paul a écrit :
Dear All
I’ve been using successfully Scilab for years, to develop my projects;
I do not remember if I’ve ever had to deal with huge matrixes but
that’s the case today.
Using “csvRead”, I got a matrix with 2.3 million of rows and 6 columns
(it took about 240 seconds to read it J); nevertheless I’ve been
surprised when I tried to remove the first row and the last column
using basically:
MAT(1,:) = []; MAT(:,$) = [];
in the meantime (before we fix this), you can do
MAT = MAT(:,1:$-1);
which will be way faster !
S.
Indeed I needed to kill the process after about 10 minutes (same
result both under Windows 10 and Linux – RAM not fully used).
By comparison, the same process is instantaneous under Python using
Numpy (numpy.delete) using of course the same matrix.
A feedback I wanted to share ….
PaulEXPORT CONTROL :
« Cet email ne contient pas de données techniques »
« This email does not contain technical data »
_______________________________________________
users mailing list
users@lists.scilab.org
https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/lists.scilab.org/mailman/listinfo/users
--
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet
_______________________________________________
users mailing list
users@lists.scilab.org
http://lists.scilab.org/mailman/listinfo/users
