h = histp(x, xmin, xmax, nbins)
histp(x, xmin, xmax, nbins) takes a column vector x
of data values and generates a normalized histogram plot of the
distribution. The histogram has nbins bins lying in the
range xmin to xmax.
h = histp(...) returns a vector of patch handles.
demgaussCopyright (c) Ian T Nabney (1996-9)