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
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Christophe Dang Ngoc Chan
Mechanical calculation engineer
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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
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