Error using boxchart on matrix data

I am trying to use boxchart() to plot a 3x44 double matrix in Matlab R2020b. Let's call my variable 'Y'. When I call boxchart(Y) I get the following error message:

% Error using boxchart (line 108)
% Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data inputs which can be converted to double.

Line 108 refers to this:

107    % Configure x-axis and convert xgroupdata to numeric
108    matlab.graphics.internal.configureAxes(cax,xgroupdata,ydata);

I get the same error message if I follow the tutorial here: openExample('graphics/CreateBoxChartsFromMatrixDataExample')

What may be the issue here?

[Cris LaPierre]

Have you tried restarting MATLAB?

[Yngve Bøe]

I have not tried restarting, but upgrading to 2021a fixed it.

[Thorsten Becker]

i hvae the same issue. I run 2021a

[Cris LaPierre]

Please share your code and the complete error message (all the red text)

Answer 1

[Roelof du Plessis]

First create a new empty figure before running boxchart. A previous figure with a "hold on" can cause this error.

[Daniel Song]

I had a similiar issue. This fixes it, thanks

[Cris LaPierre]

As a best practice, always pair a 'hold on' with a 'hold off'