left y axis values are not visible

Hi,

i use Matlab 2022a .

i plot dual y chart and the left y axis values are not visible .

below is capture of the plot and the code that i use for plotting in matlab app designer

yyaxis(app.UIAxes,'left')

plot(app.UIAxes,app.days,app.CumCases);

hold (app.UIAxes,'on');

yyaxis(app.UIAxes,'right')

plot(app.UIAxes,app.days,app.CumDeaths);

hold (app.UIAxes,'off');

appriciate your support

[Cris LaPierre]

I can't reproduce. Is there more code you can share? Perhaps the entire app? Consider sharing your data by saving it to a mat file and attaching it to your post using the paperclip icon.

As an aside, you do not need to use hold here.

[dpb]

What happens if you just plot() one set of data first, without the yyaxis stuff? Does axes show normal size/labels, then?

Have you done anything to the UIAxes 'Position' or other properties other than default elsewhere/first? Something like that would be my first guess...or somehow managed to turn the 'Visible' property to 'Off'

What does

app.UIAxes.YAxis.Visible

show at command line if set a breakpoint after the first call to plot?

Answer 1

[Cris LaPierre]

The issue is happening because you have set your X and Y tick modes and tick label modes to Manual. Set them back to Auto, and you will see ticklabels automatically appear on your left Y-Axis.

Otherwise, be sure to manually set Y ticks and X tick labels. Without them, the Y axis will remain blank.