how to save gif animation with white or transparent background?

when i save gif as you can see in this code:

https://dl.dropboxusercontent.com/u/38094905/Shape_animation_script.m

the background is saved in gray color how can i save gif animation with white/transparent(same as when i save as png)?

Answer 1

[Kevin Li]

I have tried the following command and it works.

set(gcf, 'color', 'white');

In the command, "gcf" is "Current figure handle".

As for transparent background, you can change 'white' to 'none', but the background may display as black. I think it is because gif file does not support alpha channel as png does.

Answer 2

[Kobi]

is it even possible?