help drarea
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Title

     Draw an overlapping range area plot

Syntax

        drarea hi1 lo1 hi2 lo2 x [, options]

    options                 Description
    -------------------------------------------------------------------------
    Main
      color(colorstylelist)  specifies the two colours for the two separate
                              range areas.
      add                    specifies that markers are plotted in addition
                              to the range plots.
      twoway_options         specifies additional options in the graphic.
    -------------------------------------------------------------------------

Description

    Multiple graphics are produced in Stata by the rule "last drawn first
    seen". So the objects that are drawn last are the ones that are observed.
    The implication of this principle is that when overlapping two rarea
    graphs the overlapping area is hidden by the second rarea graph.  This
    command drarea overlays two range area plots by merging the two colours
    and hence highlighting the true overlap. There are numerous graphics that
    could benefit from the same principles but at the moment the graphics
    engine does not remember what is beneath the plots that are observed.

    drarea is short for double rarea plot

Options

        +------+
    ----+ Main +-------------------------------------------------------------

    color(colorstylelist) specifies the two colours for the two separate
        range areas. The option requires the same colorstyle be used and can
        handle both the words or the RGB format (CYMK is not supported at the
        moment). Note: if a third colour is specified then this will be the
        colour of the overlapping area.

    add specifies that markers are plotted in addition to the range plots.

Examples

    sysuse sp500, clear

    gen high2 = high+15*uniform()

    gen low2 = low+15*uniform()

    drarea high low high2 low2 date in 1/20

Author

Adrian Mander, MRC Human Nutrition Research, Cambridge, UK.

Email adrian.mander@mrc-hnr.cam.ac.uk

See Also

Related commands:

twoway rarea

Other Graphic Commands I have written:
trellis     (if installed)   ssc install trellis     (to install this command)
cdfplot     (if installed)   ssc install cdfplot     (to install this command)
contour     (if installed)   ssc install contour     (to install this command)
surface     (if installed)   ssc install surface     (to install this command)
batplot     (if installed)   ssc install batplot     (to install this command)
plotbeta    (if installed)   ssc install plotbeta    (to install this command)
graphbinary (if installed)   ssc install graphbinary (to install this command)
palette_all (if installed)   ssc install palette_all (to install this command)
plotmatrix  (if installed)   ssc install plotmatrix  (to install this command)
metagraph   (if installed)   ssc install metagraph   (to install this command)