Add element to legend outside for loop

Question

Yvet 2021-2-23

0
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https://ww2.mathworks.cn/matlabcentral/answers/753739-add-element-to-legend-outside-for-loop

回答： Jemima Pulipati 2021-2-25

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Hi all,

I have a for loop creating 1 figure with multiple lines in it.

Outside of the for loop, I'm adding 1 more line (which can't be done within the for loop).

My legend has a value for each iteration in the for loop, but now I want to add the value of the line outside the for loop as well.

How can I do this?

test = [1 2 3 4 5 6 7 8];
test2 = [11 12 13 14 15];
for i=1:length(test)
    for j=1:length(test2)
        results(j,:) = [value1 value2 value3];
    end
    plot(results(:,1),results(:,2))
    xlabel('value1')
    ylabel('value2')
    legend(strcat('This is my test: a = ',num2str(test')))
end
plot(results(:,1),results(:,3)) % I only need these values for the very last iteration
legend('some text no numbers or values')

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Yvet 2021-2-23

Thank you for your quick reply!

It now partly works. It indeed adds the 'some text no numbers or values' to the legend, But it doesn't show the color line in the legend for all iterations. Do you know how I can solve this?

Yvet 2021-2-23

And do you perhaps also know how I could find the intersection between each 'test' line and the 'test2' line? The numbers in the arrays used for plotting will not be exactly the same at the intersection point, so I can't use intersect.

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