Call matfiles in a loop and save the graph without overwriting the former ones

Hello Community,

I'm trying to write loop for data processing. The script should load a matfile and create a graph for every file with subsequent saving the files.

The data processing works just fine and I see that the figures are created. I process 36 matfiles and after the run, 36 figures are created in 36 matlab windows, but in the folder are the 36 matfiles and only 1 svg. The files are saved but the next overwrites the former. The indexing is not working.

I used that script:

clc,close all
matfiles = dir('*.mat') ; 
N = length(matfiles) ; 
for i = 1:N
    load(matfiles(i).name)
    ...
    % etc. script loads data 
    figure('Units','centimeters','Position',[0 0 25 16],'PaperPositionMode','auto');
    % creates a plot
    ...
    set(gcf,'PaperPositionMode','auto')
    filename = ['plot',num2str(i),'.svg']
    saveas(gcf,filename,'svg');
end

Best regards

S. B.

Answer 1

[Sulaymon Eshkabilov]

You should start your code with clearvars, e.g:

clearvars
delete plot*.svg
%%

Then try this syntax:

% then try this syntax:
...
    for ii = 1:N
    A = load(matfiles(i).name);  
    % Make sure that the loaded data is correctly chosen to plot it
    plot(A.data)  % Note this
...
 Filename = strcat(['plot',num2str(ii),'.svg'])
 %saveas(gcf,Filename,'svg');  % Works perfectly OK that I have tested, but you should try this one instead.
 saveas(gcf,Filename);  
 end

Note that it is a good programming habit to use "ii" instead of "i".

Answer 2

[Sulaymon Eshkabilov]

% Try this
...
 filename = strcat(['plot',num2str(i),'.svg'])
 saveas(gcf,filename,'svg');

[Steffen Bxyz]

Thanks for your answer,

unfortunately it's still not working.

clc,close all

matfiles = dir('*.mat') ; 
N = length(matfiles) ; 
iwant = cell(N,1) ;  % to save output 
for i = 1:N
load(matfiles(i).name)

....

figure('Units','centimeters',...
    'Position',[0 0 25 16],...
    'PaperPositionMode','auto');

....
set(gcf,'PaperPositionMode','auto')

 filename = strcat(['plot',num2str(i),'.svg'])
 saveas(gcf,filename,'svg');
end

I don't have a clou why

[Steffen Bxyz]

Thanks for your answer,

it solves the problem.

Now it's working like intended

Best regards

S.B.

[Sulaymon Eshkabilov]

Most welcome!