Save figure name as string

How do I save a file name as a string? hFig is the Figure I want to save and str is the name I want to save this figure as. When I run it i get the below message:

Error using saveas (line 96)

Invalid filename.

str = 'ERP_GRP_1'

saveas(hFig, fullfile(path, [str '.jpeg']));

Answer 1

[cr]

saveas(hfig,[directoryPath, str, '.jpeg'])

directoryPath is the string with ending in fileseperator / or \ depending on your OS. If your directory path string doesn't end in it you may include filesep() in the brackets.

[DavidL88]

Thanks. I tried this but I get this error. I tired adding a separator but same error.

Error using saveas (line 96)

Invalid filename.

directoryPath=fullfile('*\Desktop\EEG figures'); 
saveas(hFig,[directoryPath, str, '.jpeg'])

[cr]

I'm not sure if you need fullfile() here. Just use the path c:\user\Desktop\EEG figures\. I'd presume the line you are executing in your Matlab doesn't contain " * ".

[DavidL88]

That worked thanks.

[Steven Lord]

You can still use fullfile, you just need to assemble the file name separately.

directoryPath='*\Desktop\EEG figures';
saveas(hFig, fullfile(directoryPath, [str, '.jpeg']))

But the fact that your file path starts with a wildcard seems problematic. I also would recommend against storing your data on the Desktop; sure it's convenient to access manually by clicking on the folder on the desktop, but it makes it more difficult to access the data programmatically.

Answer 2

[Image Analyst]

If you have r2020b or later you should use exportgraphics().

And you should not use JPG format unless you're willing to have horrible jpeg compression artifacts.

str = 'ERP_GRP_1';
% Create filename with folder prepended.
folder = pwd; % Or whatever you want.
fullFileName = fullfile(folder, [str, '.png']);
% Save hFig
exportgraphics(hFig, fullFileName);