Users can upload their files by uigetfile and download result by uiputfile. Please keep in mind that uigetfile and uiputfile are supported in WebApps from R2018b.
The following examples can import users' uploaded CSV file and download Excel file. The downloaded file will be found browser's download folder (for example, if Windows, C:\Users\USERNAME\Downloads)
uigetfile example:
% Button pushed function: UploadButton
function UploadButtonPushed(app, event)
[file, path] = uigetfile({'*.csv*'}, 'File Selector', 'MultiSelect', 'on');
if isequal(file,0)
disp('Canceled')
else
% Read input file
inpuFilePath = fullfile(path,file);
tbl = readtable(inpuFilePath);
% Do some calculation
app.resultTbl = table;
app.resultTbl.col1 = tbl.col1 + tbl.col2 + tbl.col3;
end
end
uiputfile example:
% Button pushed function: DownloadButton
function DownloadButtonPushed(app, event)
[file,path] = uiputfile('results.xlsx');
resultFilePath = fullfile(path,file);
writetable(app.resultTbl, resultFilePath)
end
Also, I've attached sample mlapp file and csv file for this demo. Please see Sample_mlapp.zip. If compiled as a WebApps, the app would look like this.
Users can download results.xlsx into their machine.
