How to make a plot from for loop where the results are a 3x1 matrix?

Question

Nikolai 2020-9-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596056-how-to-make-a-plot-from-for-loop-where-the-results-are-a-3x1-matrix

回答： Star Strider 2020-9-18

s=300
r=25
k=30
kukat=[s;r;k]
A=[0.23 0 233;0.74 0.52 0;0 0.35 0.46]
a=15
hold on
for x=1:a
    maarat=A^x*kukat
end

So here is my for loop and my goal would be to create a plot where there would be three lines. One line would show the results of the first row of the 3x1 matrix. I've tried to look it up but my lack of english skills makes it hard.

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Answer 1

Star Strider 2020-9-18

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596056-how-to-make-a-plot-from-for-loop-where-the-results-are-a-3x1-matrix#answer_496855

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Try this slight variation on your code:

s=300;
r=25;
k=30;
kukat=[s;r;k];
A=[0.23 0 233;0.74 0.52 0;0 0.35 0.46];
a=15;
x=1:a;
for k = 1:numel(x)
    maarat(:,k) = A^x(k)*kukat;
end
figure
semilogy(x, maarat)
grid
xlabel('x')
ylabel('maarat')