Embedded matlab function error..

2012 2 8
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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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Kaustubha Govind
Kaustubha Govind 2012-2-8

2 个投票

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);

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Sriharsha
Sriharsha 2012-2-9
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;
-------------------------------------------------
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 :?]
--------------------------------------
Kaustubha Govind
Kaustubha Govind 2012-2-9
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;

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