Parse error when trying to change a text in app designer

Hi,

In app designer for some specific dropdown value, I want some other text to change. I want them to be differrent than starting values only for a distinct dropdown value so I thought it would be better to use while instead of if. However I am getting parse error at the line where I define the condition. My code is:

methods (Access = private)
        
        function updatePlot(app)
            app.CompleteLamp.Color = [0.5 0.5 0.5] ;
            while app.TypeDropDown.Value = 'normalnontruncated'
               app.HumanCapitalUpperLimitEditFieldLabel.Text='Mean'
               app.HumanCapitalUpperLimitEditFieldLabel.Text='Standard Deviation'
            end
          
            if app.SigmaSlider.Value>0.99/app.AlphaSlider.Value
                app.SigmaSlider.Value=0.99/app.AlphaSlider.Value;
            end
            if app.AlphaSlider.Value>0.99/app.SigmaSlider.Value
                app.AlphaSlider.Value=0.99/app.SigmaSlider.Value;
            end
            
            sigma = app.SigmaSlider.Value ;
            tau = app.TaxRateSlider.Value ;
            alpha = app.AlphaSlider.Value ;
            hu=generateH(app);
            lenh=length(hu);
            [ku,ela]=genInv(app);
            
            
            pubshare=sum(ku==0)/lenh;
            
        
        
            
                                
            
                plot(app.PulsePlotUIAxes, hu, ku);
                xlabel(app.PulsePlotUIAxes,'Individuals');
                ylabel(app.PulsePlotUIAxes,'Investment');
                tegzt={sprintf('Investment level alpha=%.2f, sigma=%.2f and TaxRate=%.2f', alpha, sigma, tau)};
                title(app.PulsePlotUIAxes,tegzt,'FontSize',14);
            
                
            app.ps.Value = round(pubshare,3);
            app.elas.Value={sprintf('Human capital elasticity is %.2f',ela)};
            app.CompleteLamp.Color = [0 1 0] ;
        end
        end

At the line where I use 'while' I get the error : "Parse error at '=': usage might be invalid MATLAB syntax"

Thank you

Answer 1

[Image Analyst]

Try

while strcmpi(app.TypeDropDown.Value, 'normalnontruncated')

If that doesn't work, like maybe if the .Value property is a number rather than a string, use the number, like

    while app.TypeDropDown.Value == 3 % Or whatever number in the drop down list 'normalnontruncated' occurs at.

[Fego Etese]

Please I need your help Image Analyst. I don't know how to contact you and my deadline for my project is drawing nearer. Please can you help me answer this question

https://uk.mathworks.com/matlabcentral/answers/509963-how-to-confirm-that-a-template-image-is-found-in-the-primary-image-using-cross-correlation?s_tid=prof_contriblnk

I can get the correlation between two images i.e. a template and the bigger one, but I don't know how to confirm if the template really is in the image. I apologize for asking this here but please help. Thanks