Re: Gempak- Consistent Colors

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        Tue, 1 May 2001 13:53:49 -0500 (CDT)
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Date: Tue, 1 May 2001 13:55:23 -0500
To: hardimanm <address@hidden>
From: address@hidden (John W. Nielsen-Gammon)
Subject: Re: Gempak- Consistent Colors

> What I
>would like to do is to force the yellow color onto the 4-5 field, and
>have the other colors in the list all fall into place around that,
>repeating if necessary.

Mike, and anyone else that's interested -

    I have placed two gempak subroutines, inintc.f and incint.f, onto our
anonymous ftp server, ariel.met.tamu.edu.  These subroutines replace the
corresponding subroutines in /src/gemlib/in.  I use them for our web
product generation (using gempak 5.4, but they ought to work in 5.6 too).
They do exactly what you want - allow you to keep the colors fixed even as
the range of data changes.

   The new subroutines allow
the syntax min-max-interval for the contour or fill interval (analogous
to the specification of a range of vertical levels in other programs).
When used in conjunction with a list of colors, contour "min" will
always have color 1 (whether or not it exists), contour "min+interval"
will always have color 2, etc.  The syntax may also be embedded within
a list of contour levels (for example, cint=0.1;1;2-20-2 will draw
contours (and assign colors) at contour levels 0.1, 1, 2, 4, 6, 8, 10, 12,
14, 16, 18, and 20.  You can get quite fancy with this; for example, our
700 mb omega web page plots
(at http://www.met.tamu.edu/weather/models.html) use gfunc=omeg,
scale=3, and fint=-35--15-5;-12;-9-9-2;12;15;20.  Note that the new
subroutines correctly (I hope) distinguish between dashes as dashes and
dashes as minus signs.  Please let me know if you find any bugs.
                                        - John



_____________________________________________________________________
John W. Nielsen-Gammon, Dept. of Atmospheric Sciences, Texas A&M Univ.
    O&M Bldg. Rm.1012A, 3150 TAMU, College Station, TX 77843-3150
        Email: address@hidden  Phone:979-862-2248  Fax:862-4466