Re: xy plot problem

From: Mary Haley (haley AT
Date: Mon Mar 21 2005 - 09:31:48 MST

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    You can use an unadvertised routine called "fill_xy2". To see an
    example, go to:

    and look at example 17.

    This function operates on a plot that's already been created, so you
    want to first create the plot, but don't draw it or advance the
    frame. Call this function to add the filled curves, and then call draw
    and frame:

       res = True
       res@gsnDraw = False
       res@gsnFrame = False
       plot = gsn_csm_xy(wks,...,res)
       plot = fill_xy2(wks, plot, xi, yi1, yi2, colora, colorb)

    The variable xi should be the X values associated with
    both the yi1 and yi2 curves. "colora" and "colorb" are
    the colors you want to use for the areas where yi1 is above
    yi2, and below yi2. They can be color names ("red", "blue"),
    RGB values ((/0.7,0.3,0.5/)), or color indices into
    an existing color table.


    On Mon, 21 Mar 2005, jerry wrote:

    > Hi
    > I can draw X-Y plot with plot = gsn_csm_xy(.......)
    > But how to shade the different color between the 2 lines like the attach fig ?
    > Thank you
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