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From: khan Sim on 10 May 2010 06:15

i am working on the matlab embedded function, i am facing a problem in converting the code given below to matlab embedded code,

I=find(afsb0 > amp_max*P_max);
nI=length(I);
fsb0(I)=((amp_max*(P_max^2)*ones(1,nI))./afsb0(I)).* ...
exp(cj*angle(fsb0(I)));
The variable I is not defined/initialized before, afsb0 is a complex double matrix of order 1x512,
amp_max and P_max are two scalars.

How can make the above code compatible with matlab embedded code, have the same effect.

thanx
From: Michael Hosea on 10 May 2010 17:47
You sure afsb0 is complex? I would have thought you'd want it to be real
(e.g., abs(fsb0)) if you were going to compare "absf0 > amp_max*P_max". If
so, I think your code *should* work in R2009b and later, but I can't be sure
without checking. Anyway, I never use FIND in Embedded MATLAB, even though
it is supported now. How about

for k = 1:length(fsb0)
if afsb0(k) > amp_max*P_max
fsb0(k) = (amp_max*(P_max^2)./afsb0(k)).*exp(cj*angle(fsb0(k)));
end
end
--
Mike


"khan Sim" <akhun85(a)yahoo.com> wrote in message
news:hs8mbd$au6$1(a)fred.mathworks.com...
>
> i am working on the matlab embedded function, i am facing a problem in
> converting the code given below to matlab embedded code,
>
> I=find(afsb0 > amp_max*P_max);
> nI=length(I);
> fsb0(I)=((amp_max*(P_max^2)*ones(1,nI))./afsb0(I)).* ...
> exp(cj*angle(fsb0(I)));
> The variable I is not defined/initialized before, afsb0 is a complex
> double matrix of order 1x512,
> amp_max and P_max are two scalars.
>
> How can make the above code compatible with matlab embedded code, have the
> same effect.
>
> thanx


From: khan Sim on 11 May 2010 01:34
sir micheal hosea,
bundles of thanks for your reply. sorry it was typed by mistake, afsb0 is real but fsbo is complex.


thank you very very much.
From: khan Sim on 12 May 2010 00:34
well i am facing another problem while executing the code written by you. i want to use this code as a function in matlab embedded function block.

function fsb0 = fcn(amp_max,P_max,afsb0)
%#eml
fsb0=zeros(1,512);
for k = 1:length(fsb0)
if afsb0(k) > amp_max*P_max
fsb0(k) = (amp_max*(P_max^2)./afsb0(k)).*exp(sqrt(-1)*angle(fsb0(k)));
end
end


when i run the simulation of this function block, i face errors like,

"Embedded MATLAB Interface Error: Simulation stopped due to out of bounds error.
Block Embedded MATLAB Function2 (#55)
While executing: none"

kindly guide me here,
thanx
kind regards
From: khan Sim on 12 May 2010 01:39
well the latest progress is when i used the following code using the matlab embedded function block, errors were given


function fsb0 = fcn(amp_max,P_max,afsb0)
%#eml
fsb0=zeros(1,512);
cj=sqrt (complex(-1))
for k = 1:length(fsb0)
if afsb0(k) > amp_max*P_max
fsb0(k) = (amp_max*(P_max^2)./afsb0(k)).*exp(cj*angle(fsb0(k)));
end
end


when i run this code in the matlab embedded coder the following error is given.

"The left-hand side has been constrained to be non-complex, but the right-hand side is complex. To correct this problem, make the right-hand side real using the function REAL, or change the initial assignment to the left-hand side variable to be a complex value using the COMPLEX function.

Function 'Embedded MATLAB Function2' (#54.151.214), line 7, column 9:
"fsb0(k) = (amp_max*(P_max^2)./afsb0(k)).*exp(cj*angle(fsb0(k)))"
Launch diagnostic report."

Kindly help me out in this regard

thanx
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