error with 20x10 array in a function

Question

ETSII Departamento de Ingenieria Electrica 2014-2-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/116050-error-with-20x10-array-in-a-function

回答： Rizwana 2014-2-14

采纳的回答： Rizwana

在 MATLAB Online 中打开

Hi;

Im having this error when i run "fcp" function (detailed below).

??? Attempted to access ASEB(1,1); index out of bounds because size(ASEB)=[0,0].
Error in ==> fcp at 15
        Vsal(x)=ASEB(i,j);

Working out of the function, all variables load but it seems ASEB is not operating in the function.

Hope someone can help me

function [ Cp ] = fcp( beta,lambda )
%FCP Summary of this function goes here
%   Detailed explanation goes here
global ASE
%ASE matrix loaded in workspace previously
ASEB=(0.0003*beta.^3   -0.0044*beta.^2   -0.0479*beta   + 1.0850)*ASE;
x=0;
for i=1:20;
    for j=1:10;
          x=x+1;
          Vsal(x)=ASEB(i,j);
      end;
  end;
%como el vector Vsal tambien se reduce en abcisas, habra que multiplicarlo
%de nuevo por otra funcion de B
fB2=(0.0026*beta.^2   -0.1031*beta   + 1.2393);
Vsal=fB2*Vsal;
i=(200/20)*lambda;
fix(i);
Cp=Vsal(i);
end

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Wayne King 2014-2-13

Please format your code and you need to tell us the size of beta and lambda, give us some representative values.

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Answer 1

Rizwana 2014-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/116050-error-with-20x10-array-in-a-function#answer_124359

Your ASE is matrix of what size?? Must be huge.. try to loop it...

r = size (ASE);

for i = 1:r(1) % 1:r(2) assuming it is column-vector.

values = Asme(:,1); %reads all values

ASEB=(0.0003*beta.^3 -0.0044*beta.^2 -0.0479*beta + 1.0850)* values;

output(i,:) = ASeb;

end

outputfilename = ['output\' outputfilename];

dlmwrite(outputfilename,output, '\t');

% now use this aseb for further calculations... I hope i got this question right. Since you are not looping over your values, it is storing only last set of data

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Answer 2

Andrei Bobrov 2014-2-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/116050-error-with-20x10-array-in-a-function#answer_124273

编辑：Andrei Bobrov 2014-2-14

在 MATLAB Online 中打开

function  Cp  = fcp( beta,lambda )
    global ASE
    Vsal = polyval(conv([0.0003,-0.0044,-0.0479,1.085],...
          [0.0026,-0.1031,1.2393]), beta)*reshape(ASE',[],1);
    Cp = [];
    try
        Cp = Vsal(fix(10*lambda));
    catch
        disp('Look size of ASE and value of lamda');
    end
end