Vector to matrix using assignment - Simulink

Simple one I guess : I would like to get from a Vector (1x8) to a Matrix (2x4) using index selection from one or two external constant block(s).

I tried using the assignment block but I guess I don't really understand how to use it here. Expected output is in yellow.

Answer 1

[Andy Bartlett]

As Fangjun noted, MATLAB Function block is a good approach.

It can also be done with a combination of reshapes and selector.

Answer 2

[Andy Bartlett]

Does the reshape block meet your needs?

[David K]

Hello Andy,

So far I could only get to this result with the reshape block as it only uses dimensions (and not order) of the reference input.

As a first step I would appreciate if you knew a block to create a matrix given a input "divider constant" selecting N first values of input vector for the first row, [N+1 :N+N] values for second row etc... for e.g :

Answer 3

[Fangjun Jiang]

Your output is a 2x4 matrix. Using Assignment block, you could either

Provide a scalar value in U, assign multiple elements of the 2x4 matrix

Or, Provide the same size (2x4) value in U, assign seletive elements of the 2x4 matrix.

I couldn't figure out a way to do what you want, which is reshape plus shuffle.

The easiest approach is to use a MATLAB Function block. It just needs one line of code.

Y=U(Idx1)