How to sum matrix of different size on Simulink? (R2019a)

I have this block in my system:

The expected behavior is to perform as it's done on Matlab.

However, I receive this error:

How can I solve this problem?

PS1: I know that it seems pretty stupid. But maybe I'm pretty stupid.

PS2: I searched. Really.

Answer 1

[Rubem Pacelli]

I found out what is going on. It turns out that there is a specific block to sum a vector along a multidimensional matrix. These blocks are called:

Array-Vector add

Array-Vector subtract

Array-Vector multiply

Array-Vector divide

It can do any basic operations that I was looking for.

[Carel]

It should be noted that this requires the DSP Toolbox.

I imagine you would be able to use the simple math blocks if you can make them have the same size, but using repmat in matlab function block in simulink gives different results than using it in a .m so I haven't been able to figure out a way yet

Answer 2

[BobH]

The dimensions must agree, in MATLAB.

Z = zeros(400,32);
O = ones(1,32);
Z+O;
Error using  + 
Matrix dimensions must agree. 

O = ones(400,32);
r = Z+O;
size(r)
ans =
   400    32

[madhan ravi]

BobH implicit addition indeed exists in MATLAB

[BobH]

It does, starting with R2016b. If it's not working, a possibility is that the OP is using an older version and is seeing correct behavior for that version. Rubem, what version are you using?

https://blogs.mathworks.com/loren/2016/10/24/matlab-arithmetic-expands-in-r2016b/

https://www.mathworks.com/matlabcentral/answers/358696-does-matlab-2017b-has-a-bug-to-do-addition-operation-between-a-2-x-2-matrix-and-a-column-vector

[Rubem Pacelli]

BobH

I'm using R2019a, on Linux (Mint). When I run your example, It works correctly. However, in Simulink it doesn't happen.

[madhan ravi]

BobH if you could see in each thread of the question there is a specific field named Release for the OPs to fill in the version they use.