How do you initialize an N*M matrix?
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From the MATLAB help, it says to use:
M = matrix(N, M)
but when I apply this it says that the function 'matrix' is not recognized.
Undefined function 'matrix' for input arguments of type 'double'.
Error in experimental (line 1)
M = matrix(3,3)
3 commentaires
Réponse acceptée
Leah
le 26 Juin 2013
Modifié(e) : MathWorks Support Team
le 27 Nov 2018
To initialize an N-by-M matrix, use the “zeros” function. For example, create a 3-by-5 matrix of zeros:
A = zeros(3,5);
You can then later assign specific values to the elements of “A”.
3 commentaires
Abhishek Inamdar
le 6 Juil 2021
Use "X = ones(n)" and add the values based on the row and column. Use for loop to work on value addition
israt fatema
le 25 Août 2021
Can you please show me how to assign value to A after initialize the N x M matrix? For example i need to create a vector 5 x 5 and with values x = 20 35 49 64 23
Plus de réponses (4)
Lokesh Ravindranathan
le 26 Juin 2013
Modifié(e) : Lokesh Ravindranathan
le 26 Juin 2013
I am assuming you are trying to create an empty matrix of zeros of dimensions N*M. You can try the following instead
M = zeros(3,3)
This creates a matrix of zeros of size 3*3.
2 commentaires
per isakson
le 26 Juin 2013
Modifié(e) : per isakson
le 26 Juin 2013
matrix is a function in the symbolic toolbox.
Lokesh Ravindranathan
le 26 Juin 2013
Oh. Thanks Isakson. I will update my answer. My MATLAB did not have symbolic Math toolbox.
Pau
le 17 Oct 2018
This should make the trick
M = double.empty(N,M,0);
https://uk.mathworks.com/help/matlab/ref/empty.html
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