I make a bar plot with categorical x-values as follows:
- define legend names (that will be the labels for each bar in the bar graph) depending on if the value is normal or lowered (specificity to the app I am writing)
- make the legend names categorical
- plot them together with the heights
- add text labels
app.legendnames = strings(app.n,1);
if app.loweringHeights(i)
app.legendnames(i) = strcat("P",num2str(i),"-lowered");
app.legendnames(i) = strcat('P',num2str(i));
app.bx = reordercats(categorical(app.legendnames),app.legendnames);
b = bar(app.UIAxes, app.bx, app.by,0.5);
labels = compose("%6.0f",b(1).YData);
text(app.UIAxes, xtips,ytips,labels,'HorizontalAlignment','center','VerticalAlignment','bottom')
It looks like this
Now, when I call this plotting function again (without closing the app), each of these steps is called again. In this case, I adapt loweringHeights(2). In some way Matlab/App Designer keeps old labels that are now not anymore in use. These old labels are not part of the legendnames anymore. I know this because in other plots, the legendnames are plotted correctly. It is only in the bar graphs that I have this problem:
So I suspect the categorical thing is keeping old categories even when they are not anymore part of the new app.legendnames vector. I have no idea how to eliminate those old values. I was thinking about using removecats() but I don't see how I can tell what categories to eliminate. Any suggestions?
