alphamap (MATLAB Function Reference)

Specify the figure alphamap (transparency)

Syntax

alphamap(alpha_map)
alphamap('parameter')
alphamap('parameter',length)
alphamap('parameter',delta)
alphamap(figure_handle,...)
alpha_map = alphamap
alpha_map = alphamap(figure_handle)
alpha_map = alphamap('parameter')

Description

alphamap enables you to set or modify a figure's AlphaMap property. Unless you specify a figure handle as the first argument, alphamap operates on the current figure.

alphamap(alpha_map) set the AlphaMap of the current figure to the specified m-by-1 array of alpha values.

alphamap('parameter') create a new or modify the current alphamap. You can specify the following parameters:

default - set the AlphaMap property to the figure's default alphamap
rampup - create a linear alphamap with increasing opacity (default length equals the current alphamap length)
rampdown - create a linear alphamap with decreasing opacity (default length equals the current alphamap length)
vup - create an alphamap that is opaque in the center and becomes more transparent linearly towards the beginning and end (default length equals the current alphamap length)
vdown - create an alphamap that is transparent in the center and becomes more opaque linearly towards the beginning and end (default length equals the current alphamap length)
increase - modify the alphamap making it more opaque (default delta is .1, which is added to the current values)
decrease - modify the alphamap making it more transparent (default delta is .1, which is subtracted from the current values)
spin - rotate the current alphamap (default delta is 1; note that delta must be an integer)

alphamap('parameter',length) creates a new alphamap with the length specified by length (used with parameters: rampup, rampdown, vup, vdown)

alphamap('parameter',delta) modifies the existing alphamap using the value specified by delta (used with parameters: increase, decrease, spin).

alphamap(figure_handle,...) performs the operation on the alphamap of the figure identified by figure_handle.

alpha_map = alphamap return the current alphamap.

alpha_map = alphamap(figure_handle) returns the current alphamap from the figure identified by figure_handle.

alpha_map = alphamap('parameter') retruns the alphamap modified by the parameter, but does not set the AlphaMap property.

See Also

alim, alpha

Image: FaceAlpha, AlphaData, AlphaDataMapping

Patch: FaceAlpha, AlphaData, AlphaDataMapping

Surface: FaceAlpha, AlphaData, AlphaDataMapping

alpha angle