Convert vector loop to matrix loop

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Lev Mihailov 2022-2-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1655725-convert-vector-loop-to-matrix-loop

编辑： DGM 2022-2-22

采纳的回答： DGM

在 MATLAB Online 中打开

There is a loop for working with a vector, can it be made to work with a matrix?

z=zeros(100,900); %
x=z(:,1);
y=x;
j=1;
i=1;
u=1;
c=rand(1,900);
for i=1:100
   j=j+1;
   x(j)=x(i)+0.4*cos(20)/0.226*pi+c(1); 
   % in the c(1) loop this is because the loop is for the first column, 
   % in the matrix loop it should be c(num)
   u=u+1
   y(u)=y(i)+0.64*sin(78)/x(i)*pi+c(1);
end

I will be glad to any advice

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Dyuman Joshi 2022-2-22

Which variable(s) is/are supposed to be a matrix?

KSSV 2022-2-22

It looks like you need not to use a loop here....tell us your problem, you can vectorize the code striaght away.

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采纳的回答

DGM 2022-2-22

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1655725-convert-vector-loop-to-matrix-loop#answer_901920

编辑：DGM 2022-2-22

在 MATLAB Online 中打开

You mean like this?

c = rand(1,900);
x = zeros(100,900);
y = x;
for k = 1:99
    x(k+1,:) = x(k,:) + 0.4*cos(20)/0.226*pi + c; 
    y(k+1,:) = y(k,:) + 0.64*sin(78)./x(k,:)*pi + c;
end