 FIG  creates/activates a window
 
 
	fig() : creates a new window with default attributes (see graphinit)

	fig('background',[0 0 1],'foreground',[1 1 0]) 

	fig('colormap','hot') 

	fig('colormap',[0 0 0;1 1 1]) 

	fig(winNum) : activates the window winNum

	fig(winNum, 'background',[0 0 1],'foreground',[1 1 0]) 

	fig(winNum, 'background',[0 0 1],'foreground',[1 1 0]) 

	fig(winNum, 'margin', m) : changes the margin of the plot box,
	m has to be betwen 0 and 0.5.
