MATLAB: Create table where user can input data in App Designer

app designereditable uitableinput in uitablesMATLAB

I am a civil engineering student at ASU, in Arizona. I'm working on a code that predict viscoelastic response to some defined excitations. Now I want to Design an App by using App Designer in Matlab.

The app will require user to enter 3 parameters for each element used in the response model. I've been trying to get that from an editable table of size (n,3), where n is the 'number of elements', which is also a user input.

Editable table might not be the right tool but i only need a matrix of (n,3) from user input. Below is what I did but the zeros are irreplaceable.

 % Callback function: LoadButton, UITable
        function UITableCellEdit(app, event)
        n = app.NumberofElementsEditField.Value;
            dt = zeros(n,3,"double");
            app.UITable.Data= dt;
        end

Best Answer

You need to tell the App designer that you want which columns to be editable.

Related Solutions

MATLAB: How to make the cells in a UITable editable in an App Designer app

The property that allows the UITable to be edited by the user of the App is "ColumnEditable".

See the attached screenshot below for the user interface for modifying the "ColumnEditable" property to "true" (without quotes) for the UITable in App Designer:

The documentation for the "ColumnEditable" property is available here:

https://www.mathworks.com/help/releases/R2019b/matlab/ref/matlab.ui.control.tableappd-properties.html#bvboy7l-1-ColumnEditable

You can also set this programmatically by writing

app.UITable.ColumnEditable = true

This will allow users of the App to modify every cell in the table.

If you want to allow modification to only some columns, for example the first static and the second editable, you can set this value to a logical array like this:

app.UITable.ColumnEditable = [false, true];

After a user makes edits, it can be helpful to use the new data or indices in the app.

As an example, you could write the table to a file for later use using the UITable "CellEditCallback":

% Cell edit callback: UITable
function UITableCellEdit(app, event)
     indices = event.Indices;
     newData = event.NewData;
     writetable(app.UITable.Data, "test.xlsx")
end

More details on "writetable" are available here:

https://www.mathworks.com/help/releases/R2019b/matlab/ref/writetable.html

MATLAB: I am facing a problem in saving values from table to .mat file in app designer.

Error is in callback UITableCellEdit, because, these are two different nodes and in each tree, there is always one active. So, if you click on second tree and want to update CoM2, the app will also update the values you input to the table to the node that is active on first tree, therefore it's a flaw.

selectedNodes = app.Tree.SelectedNodes;
if strcmp(selectedNodes.Text,'Center of Mass')
if strcmp(selectedNodes.Text,'Inertia')
selectedNodes2 = app.Tree_2.SelectedNodes; 
if strcmp(selectedNodes2.Text,'Center of Mass2')
if strcmp(selectedNodes2.Text,'Inertia2')

You can create all four properties in the same tree, that would solve the issue.

Also, you can use a table with four rows and three columns (one for name of property and two for values for each model)

Also, you can use a structure, but it's a bit more complicated solution, better if you have many models that you want to calculate properties for

% This is just an idea, ideally you would have structure S.Model_1.dx, ...
S.Property = {'dx';'dy';'dz'; 'Ixx'; 'Iyy'; 'Izz'};
S.Model_1 = {4; 2; 3; 1; 2; 3;}
S.Model_2 = {1; 2; 4; 1; 4; 3;}
T = struct2table(S)
app.UITable2.Data = T
% You can create a callback that would update the values in fields and save structure

Regarding the last thread, callback won't be executed if the value did not change.

Best Answer

Related Solutions

MATLAB: How to make the cells in a UITable editable in an App Designer app

MATLAB: I am facing a problem in saving values from table to .mat file in app designer.

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