How to ask the user how many file extensions to search for

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Nom 2019-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/480269-how-to-ask-the-user-how-many-file-extensions-to-search-for

评论： Nom 2019-9-17

采纳的回答： Adam Danz

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I currently have a script which find files in a folder with a matching string that the user inputs.

I also have code where the user enters the file extensions he wants the script to look for.

ext1 = inputdlg('Please enter file extension #1: **\*. ');
ext2 = inputdlg('Please enter file extension #2: **\*. ');
ext3 = inputdlg('Please enter file extension #3: **\*. ');
  
fileData = [dir(fullfile(fileLoc,char(ext1))); dir(fullfile(fileLoc,char(ext2))); dir(fullfile(fileLoc,char(ext3)))];

What I want to do instead of ask the user how many different file extensions he wants to look for and then ask for them accordingly.

(e.g. User inputs he wants to search for 5 different file extensions and the script asks for 5)

I'd like to do this instead of just hard-coding in how many file extensions he can search for.

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Answer 1

Adam Danz 2019-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/480269-how-to-ask-the-user-how-many-file-extensions-to-search-for#answer_391758

编辑：Adam Danz 2019-9-13

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That's too much work (for you and the user). Instead, the user could just list all file extensions in the first dialog, separated by commas. Then you can separate that list into individual extensions.

extList is a cell array of character vectors that contain the user's input list
nExt is the number of extensions entered

ext = inputdlg('Please enter file extensions separated by a comma: **\*. Example: txt, csv, ogg');
if ~isempty(ext) %check if user entered anything
    % Separate selections
    extList = strtrim(strsplit(ext{1},','));
    extList(cellfun(@isempty,extList)) = []; % get rid of empties (if any)
    
    nExt = numel(extList); %number of extensions
end

For example, in the inputdlg enter this: txt, csv, ogg, xlsx

If there is a set list of possible file extensions, a better idea would be to use a listbox where the user can merely select from a set of options.

https://www.mathworks.com/help/matlab/ref/uilistbox.html

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Nom 2019-9-13

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Thank you! Yes I've already implemented it in that exact way,

weirdly enough running this script from a .m file works flawlessly

But when I moved the new code into my app designer's code it gives this error.

Cell contents reference from a non-cell array object.

on this line

extList = strtrim(strsplit(ext{1},','));

Which is pretty confusing because this is the exact code which worked straight from a .m script file.

The app designer's code was functioning with my old way (three file extensions hard coded in)

So I'm not sure why app designer is seeing something differently

Adam Danz 2019-9-13

编辑：Adam Danz 2019-9-13

Hmmm, could you show us exactly what's in ext and the result of class(ext)?

[update]

I just embedded the code from my answer into app designer and entered a variety of inputs including several extensions, 1 extension, and empty, and there was no error.

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Answer 2

Nom 2019-9-13

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Right before

extList = strtrim(strsplit(ext{1},','));

is executed.

K>> ext
ext =
    'txt, pdf, docx'
K>> class(ext)
ans =
    'char'

Above what I put into the command script

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Walter Roberson 2019-9-13

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So somehow ext is a character vector instead of a cell array of char.

As a general fix: after you have called

ext = inputdlg('Please enter file extensions separated by a comma:. Example: txt, csv, ogg: ');

add

ext = cellstr(ext);

Though you might have to check isempty() first.

Adam Danz 2019-9-13

inputdlg should always return a cell array:

https://www.mathworks.com/help/matlab/ref/inputdlg.html#d117e728348

Where is the 'txt, pdf, docx' char array coming from? I can't be the output to inputdlg.

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Answer 3

Nom 2019-9-13

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Awesome!

I'm forever in your debt

Works perfectly!

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Nom 2019-9-16

编辑：Nom 2019-9-16

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So what's happening now weirdly is if I enter docx and search for the terms "test1 test2 test3" it works. But if I enter more than just docx e.g. (docx, txt) or even just txt alone. It gives the following error:

Error using horzcat
Dimensions of matrices being concatenated are not consistent.
Error in Testapp/StartButtonPushed (line 109)
            stmFileSearch(app,fileLoc,outputFile,rejectFile)

The error occurs on the line below, I've also marked it in the full code I've pasted below.

fileDates(~finalFlag) num2cell(fileSizes(~finalFlag) ./1024) fullPaths(~finalFlag)];

The code I'm using is below:

            tic;
            
            if ~isempty(ext) %check if user entered anything
                % Separate selections
                ext = cellstr(ext);
                extList = strtrim(strsplit(ext{1},','));
                extList(cellfun(@isempty,extList)) = []; % get rid of empties (if any)  
                nExt = numel(extList); %number of extensions
            end
            
            fileData = [];
            for i = 1:nExt
                fileData = [fileData; dir(fullfile(fileLoc, ['**\*.', extList{i}]))];
            end
                        
            % Get the dates & Sizes
            fileDates = {fileData.date}';
            fileSizes = [fileData.bytes]';
            
            % Get the full paths
            fullPaths = fullfile( {fileData.folder}, {fileData.name});
           
            overallTime = toc;
            
            strinput = char(fil);
            tic;
            xorString2 = strsplit(strinput);
            
            ignoreFlag2 = ~contains(fullPaths,xorString2,'IgnoreCase',true);
            
            finalFlag = ignoreFlag2;
            
            overallTime2 = toc;
            % Create the output
            outputData = [{'Starting Path:' fileLoc ' ';
                'Time to Execute:' [sprintf('%.2f',overallTime+overallTime2) 's'] ' ';
                'File Count:' num2str(sum(~finalFlag)) ' ';
                'Date' 'Size' 'File'};
             %vvvvvvvvvvvvvvvvvvvv ERROR vvvvvvvvvvvvvvvvvvvvvvvv
                fileDates(~finalFlag) num2cell(fileSizes(~finalFlag) ./1024)]; fullPaths(~finalFlag)];
             %^^^^^^^^^^^^^^^^^^^^ ERROR ^^^^^^^^^^^^^^^^^^^^^^^
            xlswrite(outputFile,outputData);

Nom 2019-9-16

编辑：Nom 2019-9-16

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Ok so this code below works but I have one major issue

            % Get the files
            tic;
            
            if ~isempty(ext) %check if user entered anything
                % Separate selections
                ext = cellstr(ext);
                extList = strtrim(strsplit(ext{1},','));
                extList(cellfun(@isempty,extList)) = []; % get rid of empties (if any)
                nExt = numel(extList); %number of extensions
            end
            
            fileData = [];
            for i = 1:nExt
                fileData = [fileData; dir(fullfile(fileLoc, ['**\*.', extList{i}]))];
            end
                        
            % Get the dates & Sizes
            fileDates = {fileData.date}';
            fileSizes = [fileData.bytes]';
            
            % Get the full paths
            fullPaths = fullfile( {fileData.folder}, {fileData.name});
            %NEW LINE ADDED BELOW
            fullPaths = strrep(fullPaths,fileLoc,'')'; % Remove the header path
            %NEW LINE ADDED ABOVE
            %             h1 = ['=HYPERLINK('];
            %             h2 = fileLoc;
            %             h3 = ')';
            %             strcomb = strcat(h1,h2,h3);
            %             fullPaths = strrep(fullPaths,fileLoc,strcomb);
            
            overallTime = toc;
            
            strinput = char(fil);
            tic;
            xorString2 = strsplit(strinput);
            
            ignoreFlag2 = ~contains(fullPaths,xorString2,'IgnoreCase',true);
            
            finalFlag = ignoreFlag2;
            
            overallTime2 = toc;
            % Create the output
            outputData = [{'Starting Path:' fileLoc ' ';
                'Time to Execute:' [sprintf('%.2f',overallTime+overallTime2) 's'] ' ';
                'File Count:' num2str(sum(~finalFlag)) ' ';
                'Date' 'Size (kb)' 'File'};
                fileDates(~finalFlag) num2cell(fileSizes(~finalFlag) ./1024)  fullPaths(~finalFlag)];
                
                xlswrite(outputFile,outputData);
                
                % Create the rejected output
                outputData = [{'Starting Path:' fileLoc ' ';
                'Time to Execute:' [sprintf('%.2f',overallTime+overallTime2) 's'] ' ';
                'File Count:' num2str(sum(finalFlag)) ' ';
                'Date' 'Size (kb)' 'File'};
                fileDates(finalFlag) num2cell(fileSizes(finalFlag) ./1024) fullPaths(finalFlag)];
                
                xlswrite(rejectFile,outputData);
                msgbox('Operation Completed');

I have this line in there which removes the file path's header e.g. ("C:\Users\User1\Desktop\Search Script\1.xlsx" becomes just 1.xlsx.

fullPaths = strrep(fullPaths,fileLoc,'')';

anyway to avoid this, I just want to be able to add hyper links in the future, and for that i require the full file path

Adam Danz 2019-9-17

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I'm not sure how that solved the error you were getting.

Notice at the end of this line you transpose the array.

fullPaths = strrep(fullPaths,fileLoc,'')'; % Remove the header path
%                                  HERE ^

So when you comment that out, fullPaths remains as a row-cell-array.

That causes the error when you try to horizontally concatenate the bottom line below.

outputData = [{'Starting Path:' fileLoc ' ';
    'Time to Execute:' [sprintf('%.2f',overallTime+overallTime2) 's'] ' ';
    'File Count:' num2str(sum(finalFlag)) ' ';
    'Date' 'Size (kb)' 'File'};
    fileDates(finalFlag) num2cell(fileSizes(finalFlag) ./1024) fullPaths(finalFlag)];
   %|___column array___| {______________Column array_________| |____Row array______|

Nom 2019-9-17

Oh wow, I completely forgot about that.

Thank you so much

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How to ask the user how many file extensions to search for

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