How do you change the color of legend lines? How do you make x axis go from 0 to 2pi?

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Bryan Tassin 2021-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/1442299-how-do-you-change-the-color-of-legend-lines-how-do-you-make-x-axis-go-from-0-to-2pi

回答： Cris LaPierre 2021-8-28

plot(rad1, ’red’) 
hold on 
plot(in, ‘yellow’) 
plot(in1, ‘blue’) 
plot(in2, ‘green’) 
legend({ ‘\theta3(rad)’, ‘r3(in)’, ‘r4(in)’, ‘r5(in)’ })

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Wan Ji 2021-8-28

Would you please write your code down precisely and state detailly about what you wanna do?

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Answer 1

dpb 2021-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/1442299-how-do-you-change-the-color-of-legend-lines-how-do-you-make-x-axis-go-from-0-to-2pi#answer_776034

Define the x vector to plot against; the one numeric argument form of plot, as documented, plots against the ordinal position, or
Set the tick labels as desired independently of the value to the desired values. The first is generally simpler.

legend() will use the linestyle of the lines; you've also not provided a linestyle and so the points may not show up depending upon the actual number in each of the above instructions.