MATLAB: Is there a way to make the label of a “Edit Field” in an app generated by AppDesigner to use LaTeX as an interpreter

appdesignerlabel;latexMATLAB

Is there a way to make the label of a "Edit Field" in an app generated by AppDesigner to use LaTeX as an interpreter?

Best Answer

As of MATLAB R2018b, there is no "interpreter" property for labels for the "Edit Field" component in AppDesigner. However you can use the following two workarounds:

1. You could generate the formatted text elsewhere and copy and paste it into the label field. Try it with this: β

2. You can also use the "char" command to create special characters. This will create the same string for the "Edit Field" label:

     app.EditFieldLabel.Text = char(946);

Here "app.EditFieldLabel" corresponds to the label of the "Edit Field" component in the app and "946" is the unicode value for representing " β ". You can put the above command inside the "startup.m" function of the app so that the label gets set when the app is run.

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MATLAB: How to disable Edit Field (Text) in App Designer

Here is an example to show how to control Editable about "Edit Field (Text)".

     function SwitchValueChanged(app, event)
              value = app.Switch.Value;
              if ( strcmpi(value,'On') )
                  app.VelocityEditField.Enable = 'On'
                  app.TemperatureEditField.Editable = 'On'
  %                 app.LoadEditField.Editable = 'On'
              else
                  app.VelocityEditField.Enable = 'Off'
                  *app.TemperatureEditField.Editable = 'Off'*
  %                 app.LoadEditField.Editable = 'Off'
              end
          end

This is the captured image to show the result of the above example. It is set so that editing is not possible at Temperature where Editable is off.

MATLAB: Does imshow image shift the other plots and text on the UIAxes in app designer

When 'imshow' is called, it rearranges a few of the axes properties of app.UIAxes. It changes the direction of the y-axis ('YDir'), the modes of both the aspect ratios ('PlotBoxAspectRatioMode' and 'DataAspectRatioMode'), and the values of the aspect ratios ('PlotBoxAspectRatio' and 'DataAspectRatio'). We will need to preserve the original values and reassign them after 'imshow' is called.

The first row of pixels within an image is normally at the top. By default, the 'imshow' function inverts the y-axis direction when the image is displayed on an axes by setting the 'YDir' property to 'reverse.' To revert the y-axis direction after calling 'imshow', set the 'YDir' property to 'normal'. Then, to preserve the orientation of the image, flip the image using 'flip'.

Next, the 'imshow' function sets the 'DataAspectRatioMode' property of app.UIAxes to 'manual' and the 'PlotBoxAspectRatioMode' to 'auto'. The 'DataAspectRatio' property of app.PlotLegend is then rearranged to match the ratio of the image, and the 'PlotBoxAspectRatioMode' modifies itself accordingly.

In the code below, the original 'PlotBoxAspectRatio' is preserved, then the 'PlotBoxAspectRatioMode' is set to 'manual' while the 'DataAspectRatioMode' is set to 'auto'. Finally, the 'PlotBoxAspectRatio' is reassigned to the property's original value and the 'DataAspectRatio' property modifies itself accordingly.

          % Button pushed function: Button
          function ButtonPushed(app, event)
              v = [60,0; 75,0; 75,2; 60,2];
              f = [1, 2, 3, 4, 1];
              sqHandle = patch(app.UIAxes,'vertices', v, 'faces', f, ...
                  'FaceColor', 'k', 'LineStyle', 'none');
              txtHandle = text(app.UIAxes, 80, 0, 'test text','Fontsize',12,'VerticalAlignment', 'bottom');
              hold(app.PlotLegend,'on');
              pbarOriginal = pbaspect(app.UIAxes); % preserve the original PlotBoxAspectRatio
              I = imread('myImage.jpg');
              I = flip(I); % flip the image
              imshow(I,'Parent',app.UIAxes,'XData',[90,95],'YData',[0,2]);
              % Revert the properties back to their original values
              app.UIAxes.YDir = 'normal';
              app.UIAxes.PlotBoxAspectRatioMode = 'manual';
              app.UIAxes.DataAspectRatioMode = 'auto';
              app.UIAxes.PlotBoxAspectRatio = pbarOriginal;
          end

Best Answer

Related Solutions

MATLAB: How to disable Edit Field (Text) in App Designer

MATLAB: Does imshow image shift the other plots and text on the UIAxes in app designer

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