Variable Size signal and upper bounds

Hi, I have this simple exemplary code in a Matlab Embedded Simulink Function (Matlab 2012b)

   function y = myfun(n)
   coder.varsize('y', [1 1024]);
   y = zeros(1,n);

I have also declared y to be a variable-size output.

But when running the model he keeps complaining:

"Output 'y' (#404) has variable size but the upper bound is not specified; explicit upper bound must be provided."

What am I doing wrong?

Thanks for your kind help.

Chris

Answer 1

[Sankirna Joge]

hello, i am also getting the same error but here i am passing image information to output in simulink ..

i defined

coder.varsize('y4',[0,255]);

where, y4 = [ x1, x2, x3, x4];

where, x1 = im2double(I1);

where, I1 = imread('one.jpg');

similar for x2,x3 and x4 also with their respective I2, I3, I4 values and then y4 passed to video viewer block

where i am failing to solve it ?

Answer 2

[Milad Kahrobaee]

You can work around it by:

function y  = myfun(n)
    assert (n <= 6);
y = zeros(1,n);

you should set the upper bounds for the output ("Y") in the "Edit Data" ("Size" section) and of course you should check the "Variable Size" checkbox.

Go to this link for more info: https://www.mathworks.com/help/fixedpoint/ug/variable-size-data-when-dynamic-memory-allocation-is-disabled.html