[Scilab-users] {EXT} Help for . operator
Stéphane Mottelet
stephane.mottelet at utc.fr
Mon Jun 8 11:48:45 CEST 2020
Hello,
The problem is the actual tolerance of Scilab which allows to omit the
dot fot the power operator:
--> [1 2 3]^2
ans =
1. 4. 9.
although Matlab does not allow it:
>> [1 2 3]^2
Error using ^
Incorrect dimensions for raising a matrix to a power. Check that the
matrix is square and the power is a scalar. To perform elementwise
matrix powers, use '.^'.
S.
Le 08/06/2020 à 11:21, Dang Ngoc Chan, Christophe a écrit :
> Hello Pierre,
>
>> De : Perrichon
>> Envoyé : lundi 8 juin 2020 11:07
>>
>> I don't understand le role of the « point » operator '.'
> The dot is used to have an element-wise operation.
>
> The difference is when you work with matrices, e.g. the product * will make a matrix product
>
> C = A*B -> C(i, j) = sum_k (A(i, k), B(k, j))
>
> but .* will make the elementwise product
>
> C = A.*B -> C(i, j) = A(i, j)*B(i, j)
>
> See https://antispam.utc.fr/proxy/2/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/help.scilab.org/docs/6.1.0/en_US/dot.html
>
> regards
>
> --
> Christophe Dang Ngoc Chan
> Mechanical calculation engineer
>
>
> General
> This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error), please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
> _______________________________________________
> users mailing list
> users at 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
More information about the users
mailing list