Help with isempty and exists

2011 8 1
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Hello community,
I have a simple problem. I want to prompt the user to enter a directory name, check if it exist. If it does, store that fullpath into my guidedata. If it doesnt, create the directory and also 2 subdirectories within that directory then store fullpath into guide data. The name of the directory I want to search and create folders in is named 'Labelers.' It's fullpath is C:\Users\ecorbett\Documents\MATLAB\Labelers So far I have this code:
prompt = {'Enter Labeler Name:'};
dlg_title = 'Labeler Name';
num_lines = 1;
answer = inputdlg(prompt);
if isempty('Labelers'(answer))
mkdir('Labelers','answer')
else
handles.name = answer;
guidata(gcf, handles);
handles = guidata(gcf);
end
It's not working thus far. Any advice will be greatly appreciated!

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Image Analyst
Image Analyst 2011-8-1
Why don't you just call uigetdir to let the user specify a folder and create one if needed? The "New folder" button is right there on the dialog box.
B_Richardson
B_Richardson 2011-8-2
Hmmm, hadn't considered that option. I suppose that would have been easier.

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 采纳的回答

Oleg Komarov
Oleg Komarov 2011-8-1

1 个投票

root = 'C:\Users\Oleg\Desktop\';
answer = inputdlg(prompt);
if isempty(answer{1}) || exist([root answer{1}],'dir') ~= 7
mkdir(root,'answer')
else
handles.name = answer;
guidata(gcf, handles);
handles = guidata(gcf);
end

12 个评论
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B_Richardson
B_Richardson 2011-8-1
if exist(answer,'C:\Users\ecorbett\Documents\MATLAB\Labelers') ~= 7
mkdir('answer')
I get this error:
??? Undefined function or method 'exist' for input arguments of type 'cell'.
Error in ==> act_ive_gui_new>act_ive_gui_new_OpeningFcn at 90
if exist(answer,'C:\Users\ecorbett\Documents\MATLAB\Labelers') ~= 7
B_Richardson
B_Richardson 2011-8-1
I guess its because 'answer' is a cell array and exist doesnt support that type of input.
Oleg Komarov
Oleg Komarov 2011-8-1
if exist(answer{1},'dir')
Don't change 'dir'!
B_Richardson
B_Richardson 2011-8-1
Great that works! I have one more question:
mkdir('C:\Users\ecorbett\Documents\MATLAB\Labelers','answer')
Right answer as the filename instead of the variable within answer. Do I need to remove the quotes?
Oleg Komarov
Oleg Komarov 2011-8-1
Execute in the command line:
answer{1}
'answer'
And verify what's in ans.
B_Richardson
B_Richardson 2011-8-1
I see, the {1} is used to index the cell array?
Oleg Komarov
Oleg Komarov 2011-8-1
Yes, you get to access the content of a cell array with c{} while c() retrieves the content wrapped in the cell.
B_Richardson
B_Richardson 2011-8-1
I see. So if I wanted to make a subdirectory within that newly created directory I would use:
mkdir('../answer{1}','newFolder')
?
Walter Roberson
Walter Roberson 2011-8-1
Not quite.
mkdir(['../' answer{1} '/newFolder'])
Or more readable perhaps,
mkdir(sprintf('../%s/newFolder', answer{1}))
B_Richardson
B_Richardson 2011-8-2
Thats funny, neither of them seem to work?
B_Richardson
B_Richardson 2011-8-2
if exist(answer{1},'dir')~= 7
%the line below works, but the lines to create the subfolders dont
mkdir('C:\Users\ecorbett\Documents\MATLAB\Labelers',answer{1})
mkdir(['../' answer{1} '/Labels'])
mkdir(['../' answer{1} '/Segmentation'])
B_Richardson
B_Richardson 2011-8-2
Nevermind Walter! That works! I had something else wrong! Thank you

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