How to check if one file selected when using MultiSelection in matlab?
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Eslam Hamed
am 4 Dez. 2015
Kommentiert: Ahmed Harun-Al-Rashid
am 4 Nov. 2016
I have a function that allow user to browse and choose some images like this
[filename, pathname, filterindex] = uigetfile( ...
{ '*.jpg;*.jpeg;*.png','Images (*.jpg, *.jpeg, *.png)'; ...
'*.*', 'All Files (*.*)'}, ...
'Choose Class 1 DataSet', ...
'MultiSelect', 'on');
And I take the browsed images in a cell array
ChosenImages = strcat(pathname,filename);
Now I have a problem, if the user entered one image only, it doesn't return this image as one cell, it return each character as cell, and when I use
length(ChosenImages);
it returns the number of chars in the link!
also I tried
ischar(ChosenImages{1})
to check if one cell is a cell or not but it gives me an error too.
What can I do to check if the user chosen one image or multiple images?
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Akzeptierte Antwort
Guillaume
am 4 Dez. 2015
<rant> This is a thing I hate about the way mathworks design their language. All these special cases where a function behaves differently (when n = 1 or when n is vector, or...). It hurts genericity and force you to write 'ifs' all over the place when you're expecting to cope with both the general case and the exception. And it's doubly frustrating as they must have the same if pattern in the function you call to generate that exceptional case in the first place <end rant>
To fix the problem, simply convert the exceptional case back to the generic case with:
[filename, pathname, filterindex] = uigetfile( ...
{ '*.jpg;*.jpeg;*.png','Images (*.jpg, *.jpeg, *.png)'; ...
'*.*', 'All Files (*.*)'}, ...
'Choose Class 1 DataSet', ...
'MultiSelect', 'on');
if ~iscell(filename)
filename = {filename};
end %now filename is a cell array regardless of the number of selected files.
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Walter Roberson
am 4 Dez. 2015
[filename, pathname, filterindex] = uigetfile( ...
{ '*.jpg;*.jpeg;*.png','Images (*.jpg, *.jpeg, *.png)'; ...
'*.*', 'All Files (*.*)'}, ...
'Choose Class 1 DataSet', ...
'MultiSelect', 'on');
filename = cellstr(filename);
%now filename is a cell array regardless of the number of selected files.
2 Kommentare
Ahmed Harun-Al-Rashid
am 4 Nov. 2016
Dear Roberson, I also get help to solve similar problem using your answer. Thank you so much.
Sincerely, Rashid
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