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for- loop code embedded in MATLAB Function Block shows and out of bounds error....

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Ahmed Tawfeeq
Ahmed Tawfeeq on 6 Aug 2012
Hi all ... I have the following code embedded in matlab function block :
function MQRS = MQRSGENERATOR(abd1)
%#codegen
TMP=0;
for i=1:2500
if abd1(i)>30
TMP(i-10:i+10,1)=abd1(i-10:i+10);
elseif abd1(i)<-30
TMP(i-10:i+10,1)=abd1(i-10:i+10);
else
TMP(i,1)=0;
end
end
MQRS=TMP
But the Simulation Diagnostics shows me an error message saying:Simulation stopped due to out of bounds error. Block (#37) While executing: none ....
I don't know why is that.Any one knows how to fix the problem please help.Thanks in advance.

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Answers (1)

Seyhan Emre Gorucu
Seyhan Emre Gorucu on 6 Aug 2012
You abd and TMP variables have a size. Let's say that both are 2500*2500. If i=2500, then it is possible that MATLAB will look for abs1(2490,2510) in one of these lines. As abs1 does not have 2510 columns it says out of boundary.

  2 Comments

Kaustubha Govind
Kaustubha Govind on 7 Aug 2012
Also, when i=1, you are indexing into abd1(-9:11);
Once you have fixed the indexing issue, you may also need to preallocate the variable TMP (Embedded MATLAB does not support dynamically growing matrices like MATLAB does):
TMP=zeros(size(abd1));
Ahmed Tawfeeq
Ahmed Tawfeeq on 9 Aug 2012
Hi...firstly, both abd1 and TMP are one column vector secondly , the data base I use ensures not to satisfy the condition before i approaches 10.... But I did not understand you when saying: you need to preallocate the variable TMP... TMP=zeros(size(abd1));
do you mean modifying the code to :
function MQRS = MQRSGENERATOR(abd1) %#codegen
TMP=0; TMP(1:2500)=0; for i=1:2500 if abd1(i,1)>30 TMP(i,1)=abd1(i,1);
elseif abd1(i,1)<-30
TMP(i,1)=abd1(i,1);
else
TMP(i,1)=0;
end
end
MQRS=TMP
I did that ,but nothing has changed.

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