Tweak legend entries without creating a new legend

Question

Chad Greene 2014-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/141466-tweak-legend-entries-without-creating-a-new-legend

回答： Rodrigo Bernal 2021-7-13

I have created a plot with a legend and now I would like to edit legend entries without recreating the whole legend. For example, for five legend entries I would like to reorder them like

newOrder = [2 3 5 4 1];

I can reorder the entries by first getting current legend handles and strings like this:

[~,~,plot_h,text_strings] = legend;

And then I can reorder the entries like this:

legend(plot_h(newOrder),text_strings{newOrder})

However, this doesn't only reorder the legend; it seems to delete the legend I'd already created, with its perfect placement and color scheme, etc, and creates a new legend with entries in the correct new order. How can I edit these entries without screwing up the placement, colors, boxoff, etc that I've already set?

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Answer 1

Chad Greene 2014-7-14

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https://ww2.mathworks.cn/matlabcentral/answers/141466-tweak-legend-entries-without-creating-a-new-legend#answer_145074

I did not quite figure out how to edit an existing legend, but I did work up this function that does what I needed it to do.

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Ben11 2014-7-14

Nice! Sorry I kind of forgot to update this post.

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Answer 2

Rodrigo Bernal 2021-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/141466-tweak-legend-entries-without-creating-a-new-legend#answer_746178

在 MATLAB Online 中打开

Edit a specific legend entry of an existing legend:

figu=gca;
figu.Legend.String(6)={'Edit the 6th legend'};

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Answer 3

Ben11 2014-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/141466-tweak-legend-entries-without-creating-a-new-legend#answer_144677

编辑：Ben11 2014-7-11

在 MATLAB Online 中打开

Maybe assign a handle to your legend in the first place, eg

hLegend = legend(...);

and then change the String property with the new order:

set(hLegend,'String',newOrder);

This should only update the current legend without replacing it.

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Chad Greene 2014-7-11

That's the first solution I tried, but there are a couple of issues:

1. It'd have to be set(h,'string',text_strings(newOrder))

and

2. That changes the order of the strings without changing the order of the markers beside them. I want to keep the associations between strings and their data.