15.2.2.2 Figure Properties
nextplot- May be one of
"new"
"add"
"replace"
"replacechildren"
closerequestfcn- Handle of function to call when a figure is closed.
currentaxes- Index to graphics object of current axes.
colormap- An N-by-3 matrix containing the color map for the current axes.
visible- Either
"on" or "off" to toggle display of the figure.
paperorientation- Indicates the orientation for printing. Either
"landscape" or
"portrait".