MATLAB: How to plot selected columns from UITable in app designer (2019b)

MATLABplot uitableuitable

I have created an app using designer app that displays data in a UITable. I want the user to select two columns then plot them. I have figured out how to keep track of the selected indices and get the selected columns out of that.

I tried this

T = app.UITable.Data;

plot(T(:,app.ColumnsSelected(1)),T(:,app.ColumnsSelected(2)));

The problem here is that T(:,app.ColumnsSelected(1or2)) is a table so plot gives an error because it doesn’t plot tables

I have been trying this for a while now without success.

Thanks

Best Answer

Use brace indexing

plot(app.UIAxesName, T{:,app.ColumnsSelected(1)},T{:,app.ColumnsSelected(2)});

Also, note that first input to plot shoule be the handle to UIAxes.

Related Solutions

MATLAB: CellSelectionCallback-update column name

Well, yes, for what you want to do to work, you need a way to update your UI_Column dialog whenever your CellSelectionCallback is called. At the moment, there's nothing that tells the dialog that the selection has changed.

One way to do that is to keep around the handle to the edit control in that dialog and update it in the CellSelectionCallback:

classdef app2 < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure              matlab.ui.Figure
        Panel                 matlab.ui.container.Panel
        addrowButton          matlab.ui.control.Button
        UITable               matlab.ui.control.Table
        addcolumnButton       matlab.ui.control.Button
        editnamecolumnButton  matlab.ui.control.Button
    end
    properties (Access = private)
        Data_temp=[] % Description
        UI_ColumnOldName;   % UItextarea for Selecting column name to edit
        UI_ColumnNewName;   % UItextarea for input of new column name
    end
    methods (Access = private)   
        function name_col(app,new_name) % new name column

                 app.UITable.ColumnName{(app.Data_temp(2))}=char(new_name.Value);
        end        
        function SetSelectionName(app) % select old name column
            if isgraphics(app.UI_ColumnOldName)   %edit dialog is not live is the handle is not valid
                app.UI_ColumnOldName.Value = app.UITable.ColumnName{(app.Data_temp(2))};
                app.UI_ColumnNewName.Value = app.UI_ColumnOldName.Value;
            end
        end        
    end
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)
            app.UITable.Data=cell(10,3); % default table
            app.UITable.ColumnEditable=true; 
            app.UITable.ColumnName ={'A','B','C'}; % default name
        end
        % Cell selection callback: UITablea
        function UITableCellSelection(app, event)
            app.Data_temp=event.Indices; % salva gli indici nella proprietà Data_temp (creata dall'utente)UITableCellSelection(app);
            app.SetSelectionName;
            
        end
        % Button pushed function: addcolumnButton
        function addcolumn_ButtonPushed(app, ~)
                 app.UITable.Data(:,end+1)={''}; % add column
                 column_name=char(inputdlg('column name'));
                 app.UITable.ColumnName{end+1}=column_name;
        end
        % Button pushed function: addrowButton
        function addrow_ButtonPushed(app, ~)
               app.UITable.Data(end+1,:)={''}; % add row below
        end
        % Button pushed function: editnamecolumnButton
        function editnamecolumn_ButtonPushed(app, ~)
            
            if isempty(app.Data_temp)
                 warndlg('select a cell below the desidered column'); % warning: app.Data_temp is empty
                 
            else
                UI_Column=uifigure('Name','Column Name','Position',[100 100 429 276]);
                app.UI_ColumnOldName=uitextarea(UI_Column,'Position',[100 140 100 22]);
                app.UI_ColumnNewName=uitextarea(UI_Column,'Position',[220 140 100 22]); % new name column
                UI_label=uilabel(UI_Column,'Text','new column name','Position',[220 165 100 22]);
                UI_label_2=uilabel(UI_Column,'Text','old column name','Position',[100 165 100 22]);
                UI_save=uibutton(UI_Column,'Text','Save','Position',[220 100 100 22],'ButtonPushedFcn',@(UI_save,event) name_col(app,new_name)); % change and save new column name                                
                app.SetSelectionName;  %update textarea controls
            end
        end
    end
    % App initialization and construction
    methods (Access = private)
        % Create UIFigure and components
        function createComponents(app)
            % Create UIFigure
            app.UIFigure = uifigure;
            app.UIFigure.Position = [100 100 697 560];
            app.UIFigure.Name = 'UI Figure';
            % Create Panel
            app.Panel = uipanel(app.UIFigure);
            app.Panel.Title = 'Panel';
            app.Panel.Position = [114 113 495 382];
            % Create addrowButton
            app.addrowButton = uibutton(app.Panel, 'push');
            app.addrowButton.ButtonPushedFcn = createCallbackFcn(app, @addrow_ButtonPushed, true);
            app.addrowButton.Position = [23 271 100 22];
            app.addrowButton.Text = 'add row';
            % Create UITable
            app.UITable = uitable(app.Panel);
            app.UITable.ColumnName = {'Column 1'; 'Column 2'};
            app.UITable.RowName = {};
            app.UITable.CellSelectionCallback = createCallbackFcn(app, @UITableCellSelection, true);
            app.UITable.Position = [152 108 302 185];
            % Create addcolumnButton
            app.addcolumnButton = uibutton(app.Panel, 'push');
            app.addcolumnButton.ButtonPushedFcn = createCallbackFcn(app, @addcolumn_ButtonPushed, true);
            app.addcolumnButton.Position = [24 230 100 22];
            app.addcolumnButton.Text = 'add column';
            % Create editnamecolumnButton
            app.editnamecolumnButton = uibutton(app.Panel, 'push');
            app.editnamecolumnButton.ButtonPushedFcn = createCallbackFcn(app, @editnamecolumn_ButtonPushed, true);
            app.editnamecolumnButton.Position = [19 189 112 22];
            app.editnamecolumnButton.Text = 'edit name column';
        end
    end
    methods (Access = public)
        % Construct app
        function app = app2
            % Create and configure components
            createComponents(app)
            % Register the app with App Designer
            registerApp(app, app.UIFigure)
            % Execute the startup function
            runStartupFcn(app, @startupFcn)
            if nargout == 0
                clear app
            end
        end
        % Code that executes before app deletion
        function delete(app)
            % Delete UIFigure when app is deleted
            delete(app.UIFigure)
        end
    end
end

MATLAB: How to use the value of a cell from uitable-appdesigner after push a button

You can use the handle of the uitable to get the data inside it in the form of a table object

data = app.UITable.Data;

app.UITable is the handle of the uitable in app designer. Change it according to the name of you uitable.

Best Answer

Related Solutions

MATLAB: CellSelect​ionCallbac​k-update column name

MATLAB: How to use the value of a cell from uitable-appdesigner after push a button

Related Question

MATLAB: CellSelectionCallback-update column name