How can I use a string in legend()?
98 views (last 30 days)
Show older comments
Marcel345614
on 26 Oct 2020
Commented: Penghao Duan
on 18 Apr 2021
I have the following string:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/392638/image.png)
Now I want to use this string to produce a legend to my figure. So I use
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/392643/image.png)
and get this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/392648/image.png)
But I would like to have this,
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/392653/image.png)
which I got by using the following command:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/392658/image.png)
Tthis is exactly the string Legend copied into the function legend().
How can I use directly the string Legend, without copying it to the function legend()?
Edit: I forgot the following code sniplet:
p=zeros(2*length(HG),1);
hold on;
for iter2 = 1:length(HG)
p(2*iter2-1)=plot(freq,real(n(:,iter2)), 'color', cc(iter2,:));
p(2*iter2)= plot(freq,imag(n(:,iter2)),'--', 'color', cc(iter2,:));
end
I use the variable p to skip all dotted lines in the legend.
Accepted Answer
Ameer Hamza
on 26 Oct 2020
Although Walter's comment already shows the problems with eval(), in case you still want to use the current method, then the closest you can get is something like this
fig = figure()
hold on
p(1) = plot(rand(1,10))
p(2) = plot(rand(1,10))
Legend_str1 = "[p(1) p(2)]";
Legend_str2 = "{'ABC', 'DEF'}";
legend(eval(Legend_str1), eval(Legend_str2))
0 Comments
More Answers (1)
Alan Stevens
on 26 Oct 2020
You could use
Legend = ['HS+HG = 0.5+5' ;'HS+HG = 1+5'];
legend(Legend)
But make sure there are the same number of characters (including spaces) in both strings.
2 Comments
Ameer Hamza
on 26 Oct 2020
Following alternatives does not require that character arrays have equal lengths.
Legend = {'HS+HG=0.5+5';'HS+HG=1+5'};
legend(Legend)
or
Legend = ["HS+HG=0.5+5";"HS+HG=1+5"];
legend(Legend)
See Also
Categories
Find more on Legend in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!