# Square/Circle markers with transparent faces?

Dear matplotlib gurus,

When I use

plot(t,x,'rx',t,y,'bs');

in matlab, it produces blue boxes for y, i.e., squares with a blue
border and a transparent interior, so that if one of them lies on top
of a red x, I can see the red x inside the blue box. The same
construction in matplotlib produces blue squares: squares with a black
border and a blue interior. I can change the color of the interior
with the markerfacecolor or mfc argument, e.g.,

plot(t,x,'rx');
plot(t,y,'bs',mec='b',mfc='w');

but that produces an opaque white interior which renders invisible any
red x it covers up.

I can change the transparency of a line with the alpha argument, but
there seems to be no corresponding markerfacealpha.

Is there a way in matplotlib to get a square marker with a blue border
and a transparent interior?

Thanks,

···

# Office: 0.17 (Golm) Dr. John T. Whelan Phone: +49 331 567 7117 MPI for Gravitational Physics FAX: +49 331 567 7298 (Albert-Einstein Institute)http://www.aei.mpg.de/~whelan/ D-14424 Potsdam john.whelan@...1436... john.whelan@...1437...

set markerfacecolor (a.k.a. mfc) = 'None' (make sure you include the quotes).

-Andrew

John T Whelan wrote:

···

Dear matplotlib gurus,

When I use

plot(t,x,'rx',t,y,'bs');

in matlab, it produces blue boxes for y, i.e., squares with a blue
border and a transparent interior, so that if one of them lies on top
of a red x, I can see the red x inside the blue box. The same
construction in matplotlib produces blue squares: squares with a black
border and a blue interior. I can change the color of the interior
with the markerfacecolor or mfc argument, e.g.,

plot(t,x,'rx');
plot(t,y,'bs',mec='b',mfc='w');

but that produces an opaque white interior which renders invisible any
red x it covers up.

I can change the transparency of a line with the alpha argument, but
there seems to be no corresponding markerfacealpha.

Is there a way in matplotlib to get a square marker with a blue border
and a transparent interior?

Thanks,