How to store values from a function file into an array?

Question

Phoebe 2014-3-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121007-how-to-store-values-from-a-function-file-into-an-array

回答： Md. Tanjin Amin 2017-7-8

采纳的回答： Mischa Kim

在 MATLAB Online 中打开

If I have the following from a subroutine in my code,

for counter = 1 : diagcounter

    [M]=xtMean(Xtcounter, counter);
    counter=counter+1;

end

function [ M ] = xtMean(Xtcounter, counter)

    for i = 1 : counter
        A=Xtcounter(i,:);
        mA=mean(A);
        a=A(1);
        b=A(2);
        c=A(3);
        d=A(4);
        e=A(5);
        a1=abs(a-mA);
        b1=abs(b-mA);
        c1=abs(c-mA);
        d1=abs(d-mA);
        e1=abs(e-mA);
        A1=[a1 b1 c1 d1 e1];
        M=sum(A.*A1) / sum(A)
    end

end

I know it works as it produces values for example for M as follows,

M =

0.6667

M =

0.800

M =

0.6667

M =

0.7500

I need to store all these output into an array which i will call Xtmean but I am struggling. I have tried things such as within the for counter = 1 : diagcounter loop,

for k = 1 : diagcounter

Xtmean(k)=M;

end

but then it just stores same value like 40 times. Anyway if anyone could help on this it would be MUCH appreciated! Thanks!! Phoebe

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Answer 1

Mischa Kim 2014-3-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121007-how-to-store-values-from-a-function-file-into-an-array#answer_127780

编辑：Mischa Kim 2014-3-11

在 MATLAB Online 中打开

Phoebe, just use

M(i) = sum(A.*A1) / sum(A);

in function xtMean to store values into array M.

The question is, what do you do with the returned array... How do the first and third for-loops fit into all of this? If you need to store each of the M arrays in Xtmean you are probably best of using a cell array, since the size of M seems to be changing.

 for counter = 1:diagcounter
    Xtmean{counter} = xtMean(Xtcounter, counter);
    % counter    = counter+1;
 end

Notice the curly braces (= cell array). Also, for-loops automatically increment loop indices ( counter ), so I'm not sure if you still need the command I commented out.