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Categorical bar plot in AppDesigner (change colors and add refline)

Asked by Christian on 20 May 2019
Latest activity Commented on by Jake
on 5 Jun 2019
Hello everybody,
I'm currently facing some issues with my categorical bar plot in Appdesigner. In the following a short example of what I'd like to achieve:
categorie = reordercats(categorie,{'Europe' 'Asia' 'USA'});
Data=[Population_Europe Population_Aisa Population_USA];
I'm able to plot this, but I want to add two things, which I'm currently not able to:
1) Change the colours of the bars -> e.g. Europe = blue, Asia = green and USA =red
2) Add a horizontal line at a certain value across the whole bar plot. Here's a quick example, which does not work in appdesigner:
bar(app.UIAxes,xlim,[100 100], 'r','LineWidth',2)
Thank you in advance for your help and have a great day!
Cheers, Christian


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1 Answer

Answer by Kojiro Saito on 21 May 2019
Edited by Kojiro Saito on 21 May 2019
 Accepted Answer

1) You can set colors on each bar by CData property.
b = bar(app.UIAxes, categorie, Data, 'FaceColor', 'flat');
b.CData = [0 0 1; 0 1 0; 1 0 0];
2) In order to add red horizontal line, yline is the easiest way.
yline(app.UIAxes, 150, 'r', 'LineWidth', 2)
yline(app.UIAxes, 200, 'b', 'LineWidth', 2)
Or alternatively, you can utilize grid, but line color and width is only one for this approach.
% Add holizontal red line using grid
app.UIAxes.XGrid = 'off';
app.UIAxes.Layer = 'top';
app.UIAxes.YTick = 100;
app.UIAxes.GridAlpha = 1;
app.UIAxes.GridColor = 'red';
This will work as the following.


yline(app.UIAxes, 150, 'r', 'LineWidth', 2)
yline(app.UIAxes, 200, 'b', 'LineWidth', 2)
I tried following this code, but I recieve the error "Undefined function 'yline' for input arguments of type 'matlab.ui.control.UIAxes'
yline was introduced in R2018b. Could you confirm your version?
Kojiro, it was an issue with the version. I was on 2018a. Thank you!

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