How can I automatically fill in the legend?

59 views (last 30 days)
Hi all,
I was wondering how I can automatically fill in my legend of a plot with the names of the files I load regarding excel-files (those contain numerical matrices). The code I'm using is:
material = {xlsread('dp600_2_layers_L50.xlsx',4),xlsread('dp600_3_layers_L50.xlsx',4),xlsread('dp800_3_layers_L50.xlsx',4)};
legend(material);
Clearly, I want to name the first line "dp600_2_layers_L50", the second line "dp600_3_layers_L50", etc. The error which Matlab returns is "Cell array argument must be a cell array of strings.", which seems logical. Is there any way to work around this, or do I have to fill in the legend manually each time I change the input files?
Thank you all in advance!
Thomas

Accepted Answer

CS Researcher
CS Researcher on 4 May 2016
Let us assume there are N files. You can do this:
legendTitle = cell(1,N);
for i = 1:N
%Your other operations
[~,fileName,~] = fileparts(file) % e.g., file is 'dp600_2_layers_L50.xlsx'
legendTitle{1,i} = fileName;
end
plot() % Plot whatever you need to
legend(legendTitle);
Hope this helps!
  2 Comments
Sarlota Duskova
Sarlota Duskova on 14 Apr 2020
Hello, Can I ask, I have similar problem. My code is look like this:
legendTitle = getappdata(0, 'Text')
for j = 1:nFiles
filename = cell2mat(legendTitle(j))
[~,fileName,~] = fileparts(filename);
legendTitle{1,j} = fileName
end
legend(app.axes1,{legendTitle,'Temperature'},
but it doesnot work because legendTitle is in cell array. It is work when I do this:
legend(app.axes1,legendTitle)
but I am reading multiple csv file and I want to have legends names then which is contain in legendTitle but then I have second curv which is everytime Temperature. And I need show the same count in legend as is choosen files. So how can I put name Temperature into legend which already contains legendTitle which is in cell array? Thank you for your reply.

Sign in to comment.

More Answers (1)

Thomas Schot
Thomas Schot on 4 May 2016
Works like a charm! Thanks!

Categories

Find more on Graphics Object Properties 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!

Translated by