[gradsusr] * * * New release: GrADS 2.1.1.b0 * * *

[Jeff Duda]

Jennifer,
If I understand the if() construct correctly, it sounds like it duplicates
the behavior of [possibly nested] const(maskout()). Is this correct? Does
if() have more power than that?

Jeff Duda

On Tue, Feb 14, 2017 at 8:27 AM, Jennifer M Adams <jadams21 at gmu.edu> wrote:

> Oops, the URL I provided was incorrect. My bad. Please visit
> http://cola.gmu.edu/grads/downloads.php.
> —Jennfier
>
> On Feb 14, 2017, at 9:16 AM, Jennifer M Adams <jadams21 at gmu.edu> wrote:
>
> Happy Valentines Day to all of our forum-subscribing GrADS users!
>
> Brian and I are pleased to announce a new release of GrADS, version
> *2.1.1.b0*. This build has some important and useful new features,
> perhaps the most exciting being the addition/return of User Defined Plug-in
> (UDP) functions, which are called plug-ins to distinguish them from the old
> user defined functions (from the version 1.9 era) and user defined
> extensions (from opengrads). The opengrads extensions should work with just
> a few minor adjustments to the entries in the user defined plug-in table.
> We have also added logical operators to the expression handler, (e.g.
> ‘display slp<980’) and an if() function which facilitates the use of the
> logical operators. The result of a logical expression is 1 or -1, making it
> especially easy to use with maskout(). Here’s how simple it is to create a
> mask for a lat/lon subdomain:
>   ga-> d maskout(tsfc,(lat>=-5)&(lat<=5)&(lon>=190)&(lon<=240))
>
> Another handy new scripting language function, sys(), will submit a
> command to the shell, similar to putting a “!” in front of your command,
> except that the resulting output can be captured and returned as a string
> buffer to be parsed in your script.
>
> The GrADS downloads web page (*http://cola.gmu.edu/grads/downloads.html*
> <http://iges.org/grads/downloads.html>) has been updated with links to
> the source code and pre-compiled binaries for 32-bit and 64-bit linux plus
> Mac OS X (10.9). The recent switch from HTTP to HTTPS for most .gov data
> servers requires that GrADS be linked with the OpenSSL library. This is
> done dynamically, which means that the library must be present on your
> local system in order to use the SSL-enabled builds. Because OpenSSL is not
> always available or may not be the most recent version, I have also created
> builds that are not linked with OpenSSL.
>
> The full text from the ChangeLog is copied below. Enjoy!
> —Jennifer
>
>
>     Features:
>     * Added support for User Defined Plug-in functions which replace the old UDFs
>     * Added support for logical operators in the expression syntax (gridded data only)
>     * New function 'if()' performs an if/then/else expression evaluation
>     * New scripting language function 'sys()' submits any command to the shell and
> 	returns the resulting text stream that the command sends to standard output
>     * New option '-4de' for the 'set sdfwrite' command
>     * New option for 'q define'	prints all the relevant information about a variable
>     * New command 'set barbopts' to support filled pennant flags on wind barbs
> 	
>     Misc:
>     * Added support in gxprint for mixed case file names with the -f or -b option
>     * Added descriptor file entry 'XYTRAILER' for files that have a trailer record
>
>     New/Updated Documentation:
>     * http://cola.gmu.edu/grads/gadoc/udp.html
>     * http://cola.gmu.edu/grads/gadoc/expressions.html
>     * http://cola.gmu.edu/grads/gadoc/gradfuncif.html
>     * http://cola.gmu.edu/grads/gadoc/script.html
>     * http://cola.gmu.edu/grads/gadoc/gradcomdsetsdfwrite.html
>     * http://cola.gmu.edu/grads/gadoc/descriptorfile.html
>     * http://cola.gmu.edu/grads/gadoc/gradcomdqdefine.html
>     * http://cola.gmu.edu/grads/gadoc/gradcomdsetbarbopts.html
> 	
>     Supplib Update:	
>     * Some builds are linked dynamically with OpenSSL to access data servers via HTTPS.
>       This library may not always be needed or available, so builds without OpenSSL
>       have also been provided.
>
>
>
>
>
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>
> --
> Jennifer Miletta Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> George Mason University
>
>
>
>
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>


-- 
Jeff Duda
Post-doctoral research fellow
University of Oklahoma School of Meteorology
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