Use drop down menu to select file to plot

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Konvictus177 2021-10-17

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https://ww2.mathworks.cn/matlabcentral/answers/1565701-use-drop-down-menu-to-select-file-to-plot

评论： Konvictus177 2021-10-18

Hi,

I have multiple .mat files in my folder that I load into matlab using dirfiles. How can I have a drop down menu or list that lets me select which file I want to plot and switch from one file to the other one?

for k = 1:numfiles
    myfilename = dirfiles(k).name;
    fullFileName = fullfile(PathName, myfilename);
    mydata{k} = load(fullFileName);
end

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dpb 2021-10-17

在 MATLAB Online 中打开

One of my apps uses a menu to select/change a workbook desired sheet -- the callback for the given menu action function looks like

    % Menu selected function: BillingSheetMenu
    function BillingSheetMenuSelected(app, event)
      if ~exist(app.billQualFile,'file')
        errordlg([app.billQualFile "Not Found.  Must Set Billing File First."])
        return
      end
      sheets=sheetnames(app.billQualFile);
      iv=find(contains(sheets,app.billSheet,'IgnoreCase',false));
      if isempty(iv), iv=1; end
      ix=listdlg('PromptString','Select Billing Sheet','ListString',sheets,'selectionmode','single','initialvalue',iv);
      if isempty(ix), ix=iv; end
      app.billSheet=sheets(ix);
      app.BillingSheetTextArea.Value=app.billSheet;       
    end

You'll have to have a callback function tied to something that would mimic something like the above with the content of the listbox being the files list.

The same app menu to select the file function uses uigetfile instead --

    % Menu selected function: BillingFileMenu
    function BillFileFunction(app, event)
    filestr=fullfile(app.billPath,'*Bill*.xlsx');
    [app.billFile,app.billPath]=uigetfile(filestr,'Select Desired Billing File',"MultiSelect","off");
    try
        app.BillingFolderTextArea.Value=app.billPath;
        app.BillingFfileTextArea.Value=app.billFile;
        app.billQualFile=fullfile(app.billPath,app.billFile);
        %app.BillingSheetTextArea.Value=app.billSheet;        
    catch 
        % leave unchanged; if nothing there, catch it when trying to run update
    end

Walter Roberson 2021-10-17

在 MATLAB Online 中打开

filenames = {dirfiles.name};
[indx, tf] = listdlg('ListString', filenames, 'PromptString', 'Select a file');
if ~tf; return; end   %user cancel
fullFileName = fullfile(PathName, filenames{indx});
mydata = load(fullFileName);