Defining a simple function with text/string 'on'

The Idea I'm thinking about really is simple and actually just for getting used to 'functions'

My Code is just based on:

ax = gca
ax.GridColor = [1, 1, 1];
set(ax,'color','k')

I can actually copy it in any script wher plots are included for getting a dark background. But it just strikes me as it would be easier for such things to have a simple command like grid on

So maybe you see where I am getting at: I want a function like

darkmode('Color',[1,1,1])

or simply

darkmode on

as short-cut for the code above.

It's not a huge reduction, but I could actually draw a lot of the mechanism.

[Stephen23]

@Niklas Kurz: what is your question?

[Niklas Kurz]

was fairly answered.

Answer 1

[David Hill]

function darkmode(a)
gca;
if a
    ans.GridColor = [1, 1, 1];
    set(ans,'color','k');
else
    ans.GridColor = [.15,.15,.15];
    set(ans,'color','w');
end

[Stephen23]

It is not considered good MATLAB practice to rely on ans like that. Better to obtain the output explicitly:

function darkmode(a)
axh = gca;
if a
    axh.GridColor = [1, 1, 1];
    set(axh,'color','k');
else
    axh.GridColor = [.15,.15,.15];
    set(axh,'color','w');
end