How can I automatically fill in the legend?

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

Answer 1

[CS Researcher]

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!

[Paolo Edera]

Thankyou very much!!

[Sarlota Duskova]

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.

Answer 2

[Thomas Schot]

Works like a charm! Thanks!