Embedded matlab function error..

How to resolve this type of errors?/

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Computed maximum size of the output of function 'colon' is not bounded. Static memory allocation requires all sizes to be bounded. The computed size is [1 x :?].

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Answer 1

[Kaustubha Govind]

It looks like you are trying to create a variable whose size is dynamic. For example:

   function y = myfun(n)
   y = zeros(1,n);

Since Embedded MATLAB uses static memory allocation, it cannot handle variables that change size dynamically. What you can do is declare 'y' as variable-sized while specifying an upper bound for the size.

   function y = myfun(n)
   coder.varsize('y', [1 1024]); %n must never exceed 1024
   y = zeros(1,n);

[Sriharsha]

Hi mam,

i wil let you know my function.

i am using this function inside an embedded matlab function block..

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function [tiq,Isymbols,Qsymbols,sumiq]= qpsk(N)

%#eml

fcarr=2e3;

%N=10;

fs=16*1e3;

Fn=fs/2;

Ts=1/fs;

T=1/N;

randn('state',0);

td=[0:Ts:(N*T)-Ts]';

data=sign(randn(N,1))';

data1=ones(T/Ts,1)*data;

data2=data1(:);

tiq = [0:Ts*2:(N*T)-Ts]';symbols(transpose)

bs1=data(1:2:length(data));

symbols=ones(T/Ts,1)*bs1;

Isymbols=symbols(:);

bs2=data(2:2:length(data));

symbols1=ones(T/Ts,1)*bs2;

Qsymbols=symbols1(:);

twopi_fc_t=(1:fs/2)*2*pi*fcarr/fs;

a=1;

phi=0;

cs_t = (a * cos(twopi_fc_t + phi));

sn_t = (a * sin(twopi_fc_t + phi));

cs_t=cs_t';

sn_t=sn_t';

si=cs_t.*Isymbols;

sq=sn_t.*Qsymbols;

sumiq=si+sq;

sumiq=.7*sumiq;

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And then , i am facing such errors....

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Computed maximum size of the output of function 'colon' is not bounded. Static memory allocation requires all sizes to be bounded. The computed size is [1 x :?]

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[Kaustubha Govind]

Does it point to a specific line? I can see several lines where you are creating variables of dynamic size:

data=sign(randn(N,1))';

data1=ones(T/Ts,1)*data;

tiq = [0:Ts*2:(N*T)-Ts]';

bs1=data(1:2:length(data));

symbols=ones(T/Ts,1)*bs1;

bs2=data(2:2:length(data));

symbols1=ones(T/Ts,1)*bs2;