Creation of a legend of a graph with a for loop

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Emilio Pulli 2021-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/1590334-creation-of-a-legend-of-a-graph-with-a-for-loop

评论： Star Strider 2021-11-20

I have a graph containing different curves obtained at different velocities and I need a legend linking each curve to the relative velocity at which it has been obtained. Can I create the legend of the graph with this kind of loop without typing an infinite line containing the values of all the velocities?

for l=1:length(v)
 legend([num2str(v(l)),'m/s '])
end

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Star Strider 2021-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/1590334-creation-of-a-legend-of-a-graph-with-a-for-loop#answer_835174

The problem description is a bit difficult to interpret, however there are at least two possible solutions (if I interpret it correctly).

The first is described in the legend documentation section on Specify Legend Labels During Plotting Commands

The second is described in the legend documentation on Included Subset of Graphics Objects in Legend

I believe one of these (if not both) should work. If there are problems, post back.

Note that the 'DisplayName' option also permits using sprintf to change the display name appropriately with respect to the numeric arguments in the plot call.