Simple query: how can I remove radial axes (eliminate the "spokes") on a Compass Plot

I've searched but can't find answer to how to remove the "spokes" (light gray radial axes) in a compass plot, such as:

Of course, I can do this in the Figure itself by going to Edit>Figure Properties>Axes etc. But it's not possible to "generate code" from within the figure (File>Generate code). When I try that, I get the mssg:

function createfigure
%CREATEFIGURE

%  Auto-generated by MATLAB on 21-Mar-2023 18:36:48

% Create figure
figure;

% polar currently does not support code generation, enter 'doc polar' for correct input syntax
% polar(...);

...and doc polar (or doc compass, for that matter) doesn't seem to say anything about removing axes.

Answer 1

[Chris]

I think the developers of these functions don't intend for us to be messing with the grids, or haven't gotten around to making it easy for us.

However, it can be done.

ax = gca; % Get current axes
kids = allchild(ax); % Get the lines and text and whatever else

kids will have all the stuff you'll be interested in (try entering it in the command window without the semicolon). We're looking for things that have their handle visibility set to 'off',

which is everything but the plots.

invis = strcmp(get(kids,'handleVisibility'),'off');

Now, to hide absolutely everything, you could do...

set(kids(invis),'Visible','off');

To instead only hide some things (like spokes), first find those things.

There's definitely a more elegant way to do this, but this is all I've got right now.

lineidx = find(invis & strcmp(get(kids,'Type'),'line'));

spokes = false(size(kids));
for idx = 1:numel(lineidx)
    kd = kids(lineidx(idx));
    if numel(kd.XData) == 2
        spokes(lineidx(idx)) = true;
    end
end

set(kids(spokes),'Visible','off');

It looks as if, in many cases, the spokes will be found at kids(end-14:end-9), in which case you could disregard the preceding block and simply:

set(kids(end-14:end-9), 'Visible','off');

Does that help?

[Stephen]

Yup, worked great!

I was able to boil it down to

ax = gca; % Get current axes

kids = allchild(ax); % Get the lines and text and whatever else

Many thanks!

[Stephen]

Whoops, incomplete script. Hit <send> too soon. Should be:

ax = gca; % Get current axes

kids = allchild(ax); % Get the lines and text and whatever else

set(kids(spokes),'Visible','off'); % delete the "spokes" (radial lines)

[Chris]

Glad it worked for you!

To be clear, though, "spokes" is just a variable that we defined. If you start from a clean workspace you'll have to locate them again.