MATLAB Answers


Error importing excel table into app designer table

Asked by Tamim Hussain on 27 Sep 2018
Latest activity Commented on by Micaela Boursier on 6 Aug 2019
I am a beginner to MATLAB and making an application using App Designer. I have been working and haven't been able to find an answer online, but I am trying to get a button in my app so that; when the button is clicked, I can choose a excel(csv) file to display onto the UI table once chosen.
However, I am receiving the following error; Error setting property 'Data' of class 'Table': Values within a cell array must be numeric, logical, or char
Is there a problem with my code or is this an issue with my data set? My data set contains a mixture of integers, strings, date and time.
Below is my code for the callback on the button;
[filename, pathname] = uigetfile({'*.csv'},'File Selector');
fullpath = strcat(pathname,filename);
x = readtable(fullpath);
app.UITable.Data = table2cell(x);
Many Thanks for your help


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Hi, I think it’s because my csv data has date and times in a few columns and cell arrays do not support that data type. Would there be a way around this so that I’m able to import date/time fields?
Is it possible to provide your sample data? Because I've created a dummy csv file as the attached and it works without an error with your above codes. I think it's difficult to investigate why the error occurs without your sample data.
Hi, I have attached the data I am using, you will see there is a field called date posted and time posted (date and time data type in the csv file). Also I tried importing your sample data in App Designer and I still get the same error.

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2 Answers

Answer by Kojiro Saito on 5 Oct 2018
 Accepted Answer

In case of your Journals.csv, you don't need to use table2cell. Just setting a table as a value works.
x = readtable(fullpath);
app.UITable.Data = x;
% Change column name from imported data
app.UITable.ColumnName = x.Properties.VariableNames;
Result in App Designer.


This worked! Thank you so much, really appreciate your help!
Is there a way to pull a specific cell value into app designer,
for example, a user inputs the number that appears in the first column, and based on that value the remaining values in that row would be directed to designated text value boxes in app designer? This way specific values could be changed, for faster editing.

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Answer by sarthak rawat on 21 Dec 2018

error:"Struct contents reference from a non-struct array object."
comes in line "app.UITable.ColumnName = x.Properties.VariableNames"
please help!!

  1 Comment

Could you give more detail information (codes or mlapp and csv data) to investigate why the error occurs, please?

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