How can I hold the previous "legend" on a plot?

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sadel 2011-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/9434-how-can-i-hold-the-previous-legend-on-a-plot

评论： Walter Roberson 2021-9-28

采纳的回答： sadel

I use the "hold" function to hold the previous plots. But how can I hold the previous legends, too?

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sadel 2011-6-17

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here is the answer that I was looking for:

x=0:.01:10;
plot(x, sin(x), 'DisplayName','sin');
legend('-DynamicLegend');
hold all;   % add new plot lines on top of previous ones
  plot(x, cos(x), 'DisplayName','cos');

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Harshia Mathur 2021-9-28

worked for me as well, Do you know anyway to customise this? I want to append a string, otherwise all it's saying is data1 , data2 etc..

Walter Roberson 2021-9-28

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@Harshia Mathur example

x=0:.01:10;

for alpha = [1 5 9]

plot(x, nthroot(sin(x).^alpha,7), 'DisplayName', "sin^{" + (alpha/7) + "}");

hold on;

end

hold off

ylim auto

legend show

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Gerd 2011-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/9434-how-can-i-hold-the-previous-legend-on-a-plot#answer_13022

在 MATLAB Online 中打开

For example I you would like to show the sin and cos you would use

t=[0:0.1:10]
x=sin(t)
y=cos(t)
plot(t,x)
hold
plot(t,y,'r')
legend('sin','cos')

In your case you have to build the legendstring with the two different "strings" you want to show.

but legend holding only text. It is showing legend indicators as lines, instead of asteric lines, which I used. It is not holding the marking points of plots. For holding Marker points of respective plots, what to do?

Thank You.