MATLAB: Error using horzcat Dimensions of arrays being concatenated are not consistent.

Question

Error using horzcat Dimensions of arrays being concatenated are not consistent.

The problem appears every time I press the number button

line 49

result = [app.Label_result.Text '1'];% '011'

The code or main body is as follows:

classdef RealCalculatorGlebPopov < matlab.apps.AppBase

    % Properties that correspond to app components
    properties (Access = public)
        CalculatorUIFigure  matlab.ui.Figure
        Panel               matlab.ui.container.Panel
        digit7              matlab.ui.control.Button
        digit8              matlab.ui.control.Button
        digit9              matlab.ui.control.Button
        digit4              matlab.ui.control.Button
        digit5              matlab.ui.control.Button
        digit6              matlab.ui.control.Button
        digit1              matlab.ui.control.Button
        digit2              matlab.ui.control.Button
        digit3              matlab.ui.control.Button
        dotButton           matlab.ui.control.Button
        digit0              matlab.ui.control.Button
        button_clear        matlab.ui.control.Button
        button_plus         matlab.ui.control.Button
        button_result       matlab.ui.control.Button
        button_min          matlab.ui.control.Button
        button_dev          matlab.ui.control.Button
        Button_multi        matlab.ui.control.Button
        Panel_2             matlab.ui.container.Panel
        Label_result        matlab.ui.control.Label
    end

    
    properties (Access = private)
        dotNumber 
        enableDot = 0; 
        integerNumber = 0;
        num1;
        num2;
        sing; % + - x /
    end
    

    % Callbacks that handle component events
    methods (Access = private)

        % Button pushed function: digit1
        function digit1ButtonPushed(app, event)
            result = '0';
            if app.enableDot == 1  %  we add flout number here


               app.dotNumber = [app.dotNumber '1'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process


                result = [app.Label_result.Text '1'];% '011'
            end        
            newResult = str2num(result);%  convret to number becaus no need 0 at fir


            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit2
        function digit2ButtonPushed(app, event)
             
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '2'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '2'];% '022'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit3
        function digit3ButtonPushed(app, event)
             
            result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '3'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '3'];% '033'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit4
        function digit4ButtonPushed(app, event)
               result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '4'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '4'];% '044'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit5
        function digit5ButtonPushed(app, event)
             
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '5'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '5'];% '055'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit7
        function digit7ButtonPushed(app, event)
           
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '7'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '7'];% '077'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);

        end

        % Button pushed function: digit6
        function digit6ButtonPushed(app, event)
             
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '6'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '6'];% '066'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit8
        function digit8ButtonPushed(app, event)
             
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '8'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '8'];% '088'


            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: digit9
        function digit9ButtonPushed(app, event)
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '8'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '8'];% '088'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        
        end

        % Button pushed function: digit0
        function digit0ButtonPushed(app, event)
            
             result = '0';
            if app.enableDot == 1  %  we add flout number here
               app.dotNumber = [app.dotNumber '0'];
               result = [num2str(app.integerNumber) '.' app.dotNumber];
            else  %normal process
                result = [app.Label_result.Text '0'];% '000'
            end
            newResult = str2num(result);%  convret to number becaus no need 0 at fir
            app.Label_result.Text = result(newResult);
        end

        % Button pushed function: dotButton
        function dotButtonButtonPushed(app, event)
            app.enableDot = 1;
            app.integerNumber = str2num(app.Label_result.Text);
        end

        % Button pushed function: button_clear
        function button_clearButtonPushed(app, event)
            app.Label_result.Text = '0' ;
            app.integerNumber = 0;
            app.dotNumber = '' ;
            app.enableDot = 0; %disable dot number
        end

        % Button pushed function: button_plus
        function button_plusButtonPushed(app, event)
            app.sign = '+';
            app.num1 = str2num(app.Label_result.Text);
            app.Label_result.Text = '0';
            app.integerNumber = 0;
            app.dotNumber = '';
            app.enableDot = 0;
        end

        % Button pushed function: button_result
        function button_resultButtonPushed(app, event)
            app.num2 = str2num(app.Label_result.Text);
            
            if app.sign == '+'
                app.Label_result.Text = num2str(app.num1+app.num2);
            elseif  app.sign == '-'
                 app.Label_result.Text = num2str(app.num1-app.num2);
            elseif  app.sign == 'x'
                 app.Label_result.Text = num2str(app.num1*app.num2);
            elseif  app.sign == '/'
                 app.Label_result.Text = num2str(app.num1/app.num2);
             
            
            end
        end

        % Button pushed function: button_min
        function button_minButtonPushed(app, event)
               app.sign = '-';
            app.num1 = str2num(app.Label_result.Text);
            app.Label_result.Text = '0';
            app.integerNumber = 0;
            app.dotNumber = '';
            app.enableDot = 0;
        end

        % Button pushed function: button_dev
        function button_devButtonPushed(app, event)
               app.sign = '/';
            app.num1 = str2num(app.Label_result.Text);
            app.Label_result.Text = '0';
            app.integerNumber = 0;
            app.dotNumber = '';
            app.enableDot = 0;
        end

        % Button pushed function: Button_multi
        function Button_multiPushed(app, event)
               app.sign = 'x';
            app.num1 = str2num(app.Label_result.Text);
            app.Label_result.Text = '0';
            app.integerNumber = 0;
            app.dotNumber = '';
            app.enableDot = 0;
        end
    end

    % Component initialization
    methods (Access = private)

        % Create UIFigure and components


        function createComponents(app)

            % Create CalculatorUIFigure and hide until all components are created
            app.CalculatorUIFigure = uifigure('Visible', 'off');
            app.CalculatorUIFigure.Color = [0.7176 0.2745 1];
            app.CalculatorUIFigure.Position = [100 100 560 457];
            app.CalculatorUIFigure.Name = 'Calculator';

            % Create Panel
            app.Panel = uipanel(app.CalculatorUIFigure);
            app.Panel.Position = [19 21 525 328];

            % Create digit7
            app.digit7 = uibutton(app.Panel, 'push');
            app.digit7.ButtonPushedFcn = createCallbackFcn(app, @digit7ButtonPushed, true);
            app.digit7.FontSize = 25;
            app.digit7.Position = [21 255 100 40];
            app.digit7.Text = '7';

            % Create digit8
            app.digit8 = uibutton(app.Panel, 'push');
            app.digit8.ButtonPushedFcn = createCallbackFcn(app, @digit8ButtonPushed, true);
            app.digit8.FontSize = 25;
            app.digit8.Position = [143 255 100 40];
            app.digit8.Text = '8';

            % Create digit9
            app.digit9 = uibutton(app.Panel, 'push');
            app.digit9.ButtonPushedFcn = createCallbackFcn(app, @digit9ButtonPushed, true);
            app.digit9.FontSize = 25;
            app.digit9.Position = [269 255 100 40];
            app.digit9.Text = '9';

            % Create digit4
            app.digit4 = uibutton(app.Panel, 'push');
            app.digit4.ButtonPushedFcn = createCallbackFcn(app, @digit4ButtonPushed, true);
            app.digit4.FontSize = 25;
            app.digit4.Position = [21 200 100 40];

            
            

    

        

	
    

        
Best Answer
    

    

								

								
Your label is getting defined as having 2 values (see line 404).
app.Label_result.Text = {'0'; ''};
This appears to be because the original value is defined as "0."
Remove the period, and the error goes away. 
I did notice that there are other problems still to fix, but now you can continue your testing and debugging.
						    
						
		
    
        

    

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Answer 1

Your label is getting defined as having 2 values (see line 404).

app.Label_result.Text = {'0'; ''};

This appears to be because the original value is defined as "0."

Remove the period, and the error goes away.

I did notice that there are other problems still to fix, but now you can continue your testing and debugging.