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

Question

Ahmed Tawfeeq 2012-8-6

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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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Answer 1

Seyhan Emre Gorucu 2012-8-6

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https://ww2.mathworks.cn/matlabcentral/answers/45416-for-loop-code-embedded-in-matlab-function-block-shows-and-out-of-bounds-error#answer_55572

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.

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Kaustubha Govind 2012-8-7

在 MATLAB Online 中打开

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 2012-8-9

在 MATLAB Online 中打开

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

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

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