Adding and Deleting Columns in UITable App Designer

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Ratanjot 2023-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/1916595-adding-and-deleting-columns-in-uitable-app-designer

评论： Ratanjot 2023-2-23

I have created an example app with app designer where it will output the data from the excel sheet with the UITable. The user must have the ability to delete columns 4-8 via the clicking on the checkbox and then also add them back to there respected locations in the Table as it was originally. For example, the user should be able to uncheck columns 4 and 6, which will delete the column name and the data for those columns out of the table and only display columns 1-3,5,7-13.

The problem I am having is that upon deleting the column such as column 4, it doesn't delete the specified column name, but rather the one at the very end (i.e., column 13) and the data for column 4. From there, all the data from the right side of column 4 from the original table will shift one to the left. The solution here would be so that column 4 variable name and data are deleted but the rest is kept in the table. If the user decides to put the column back in the table, it will simply be by checking the same checkbox and it will come back to where it once was. For example, if column 4 was deleted by unchecking the checkbox, then later on checked, it will return as the fourth column in the table and not at the very end like how I have it in the code currently. Thank you for your help.

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Answer 1

VBBV 2023-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/1916595-adding-and-deleting-columns-in-uitable-app-designer#answer_1176960

编辑：VBBV 2023-2-22

在 MATLAB Online 中打开

You can modify the function for columnCheckBox Value Changed as below, by using addvars function

 function Column4CheckBoxValueChanged(app, event)
            value = app.Column4CheckBox.Value;
           
            if value == 0
                app.t_final = removevars(app.UITable.Data,4);                
                app.t_final.Properties.VariableNames = ["One","Two","Three","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
                app.UITable.ColumnName = app.t_final.Properties.VariableNames;
                app.UITable.Data = (app.t_final)
            elseif value == 1                
               app.t_final = addvars(app.UITable.Data,table2array(app.t_4),'After','Three'); 
               app.t_final.Properties.VariableNames = ["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
               app.UITable.ColumnName = app.t_final.Properties.VariableNames;
               app.UITable.Data  = app.t_final;
            end
 end

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VBBV 2023-2-23

编辑：VBBV 2023-2-23

在 MATLAB Online 中打开

It is at this moment that the thirtheenth variable name disappears. This is common in most Apps built on App designer, but when you look at final output, the variablename appears again after brief time, for reasons related to UItable operations.

Regarding the series of checkboxes, you can

Try something like for series of checkboxes, but you need to ensure, the checkbox property value to pass between callbacks to check for all states /conditions of checkboxes.

function Column4CheckBoxValueChanged(app, event)
            value4 = app.Column4CheckBox.Value;
           
            if value5 == 0 & value4 == 0   % check whether both checkboxes are unchcked 
                app.t_final = removevars(app.UITable.Data,["Four","Five"]);                
                app.t_final.Properties.VariableNames = ["One","Two","Three","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
                app.UITable.ColumnName = app.t_final.Properties.VariableNames;
                app.UITable.Data = (app.t_final);
            elseif value4 == 0  % only checkbox 5
                app.t_final = removevars(app.UITable.Data,"Four");                
                app.t_final.Properties.VariableNames = ["One","Two","Three","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
                app.UITable.ColumnName = app.t_final.Properties.VariableNames;
                app.UITable.Data = (app.t_final);
            elseif value4 == 1  & value5 == 0 
               app.t_final = addvars(app.UITable.Data,table2array(app.t_4),'After','Three'); 
               app.t_final.Properties.VariableNames = ["One","Two","Three","Four","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];                
               app.UITable.ColumnName = app.t_final.Properties.VariableNames;
               app.UITable.Data  = app.t_final;
            elseif value5 == 1 & value4 == 1
                app.t_final = addvars(app.UITable.Data,table2array(app.t_5),'After','Three'); 
               app.t_final.Properties.VariableNames = ["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];                
               app.UITable.ColumnName = app.t_final.Properties.VariableNames;
               app.UITable.Data  = app.t_final;              
            end
        end
        % Value changed function: Column5CheckBox
        function Column5CheckBoxValueChanged(app, event)
            value5 = app.Column5CheckBox.Value;
            if value5 == 0 & value4 == 0   % check whether both checkboxes are unchcked 
                app.t_final = removevars(app.UITable.Data,["Four","Five"]);                
                app.t_final.Properties.VariableNames = ["One","Two","Three","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
                app.UITable.ColumnName = app.t_final.Properties.VariableNames;
                app.UITable.Data = (app.t_final);
            elseif value5 == 0  % only checkbox 5
                app.t_final = removevars(app.UITable.Data,"Five");                
                app.t_final.Properties.VariableNames = ["One","Two","Three","Four","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];
                app.UITable.ColumnName = app.t_final.Properties.VariableNames;
                app.UITable.Data = (app.t_final);
            elseif value5 == 1  & value4 == 0 
               app.t_final = addvars(app.UITable.Data,table2array(app.t_5),'After','Three'); 
               app.t_final.Properties.VariableNames = ["One","Two","Three","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];                
               app.UITable.ColumnName = app.t_final.Properties.VariableNames;
               app.UITable.Data  = app.t_final;
            elseif value5 == 1 & value4 == 1
                app.t_final = addvars(app.UITable.Data,table2array(app.t_5),'After','Three'); 
               app.t_final.Properties.VariableNames = ["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"];                
               app.UITable.ColumnName = app.t_final.Properties.VariableNames;
               app.UITable.Data  = app.t_final;              
            end
        end

VBBV 2023-2-23

Anyways, your question was related to adding and deleting the data to table in App using checkboxes. Please open a new question, if you have further questions

Ratanjot 2023-2-23

编辑：Ratanjot 2023-2-23

If I understand correctly, since I have 5 checkboxes, would I need to follow this same method. This would cause for many possible combinations. I thought that there may have been an easier solution to this. But if not then its okay. I appreciate all the help!

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Answer 2

Simon Chan 2023-2-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1916595-adding-and-deleting-columns-in-uitable-app-designer#answer_1178025

在 MATLAB Online 中打开

app8_modify.mlapp

Attached is another apporach for your reference.

The modification includes the followings:

(1) Save the original table in the 'UserData' of the uitable.

app.UITable.UserData = app.UITable.Data;

(2) Assign the column number to 'Tag' of the checkbox for that column. Such as 5 for app.Column5CheckBox

(3) The callback for each checkbox would be almost the same except the name of the checkbox.

The following shows the callback for Column4CheckBox and Column5CheckBox as an example.

% Value changed function: Column4CheckBox
        function Column4CheckBoxValueChanged(app, event)
            value = app.Column4CheckBox.Value;
            idx = ismember(["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"],app.UITable.ColumnName);
            idx(str2double(app.Column4CheckBox.Tag))=~value;
            app.UITable.ColumnName = app.UITable.UserData.Properties.VariableNames(idx);
            app.UITable.Data = app.UITable.UserData(:,idx);
        end
        % Value changed function: Column5CheckBox
        function Column5CheckBoxValueChanged(app, event)
            value = app.Column5CheckBox.Value;
            idx = ismember(["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen"],app.UITable.ColumnName);
            idx(str2double(app.Column5CheckBox.Tag))=~value;
            app.UITable.ColumnName = app.UITable.UserData.Properties.VariableNames(idx);
            app.UITable.Data = app.UITable.UserData(:,idx);            
        end

On the other hand, I set all checkboxes to false when the program start.

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Ratanjot 2023-2-23

Exactly the answer I was looking for. Thanks a lot!!!

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Adding and Deleting Columns in UITable App Designer

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