[gradsusr] gradsusr Digest, Vol 14, Issue 62
Zilore Mumba
zmumba at gmail.com
Fri Apr 29 10:22:34 EDT 2011
Simba,
To add to Wesley's, if you have a grib file or a binary file (eg written by
fortran) you can just edit an existing ctl file (without using grib2ctl) and
put in the relevant info, xdef, ydef, zdef, tdef vars, levels etc.
Fir installing grads on a linux box just do "yum install grads" then you do
not have to worry about libraries and so on.
Zilore
On Fri, Apr 29, 2011 at 10:21 AM, <gradsusr-request at gradsusr.org> wrote:
> Send gradsusr mailing list submissions to
> gradsusr at gradsusr.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://gradsusr.org/mailman/listinfo/gradsusr
> or, via email, send a message with subject or body 'help' to
> gradsusr-request at gradsusr.org
>
> You can reach the person managing the list at
> gradsusr-owner at gradsusr.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of gradsusr digest..."
>
>
> Today's Topics:
>
> 1. Re: How to use grib2ctl option for one chosen variable
> (Wesley Ebisuzaki)
> 2. Installing opengrads in x86_64 GNU/Linux (Roberto Mera)
> 3. Re: Installing opengrads in x86_64 GNU/Linux (James T. Potemra)
> 4. Re: Installing opengrads in x86_64 GNU/Linux (saeed bayat)
> 5. Re: how to find typhoon center via minloc function
> (sushant puranik)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 28 Apr 2011 09:55:20 -0400
> From: Wesley Ebisuzaki <Wesley.Ebisuzaki at noaa.gov>
> Subject: Re: [gradsusr] How to use grib2ctl option for one chosen
> variable
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <4DB971C8.9080904 at noaa.gov>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Simba,
>
> No option for grib2ctl/g2ctl. The solution depends on why you want
> to make
> the ctl file for a subset.
>
> (1) grib2ctl is choosing the wrong vertical coordinate
>
> You have to make a new grib file with only the variables that you want.
> Simple task for wgrib.
>
> (2) Vertical coordinate is ok.
>
> Edit the ctl file by removing all the unwanted fields. Then change
> the "vars N" line
> so that N is the new number of fields in the control file.
>
> Wesley Ebisuzaki
>
> Chidzambwa Simba wrote:
> > Dear All,
> > Is there an option that you can use with 'grib2ctl' to create a data
> > descriptor file for just one or two variables from a group of
> > variables? For example for just the u and v wind components?
> >
> > Regards
> > Simba
> >
> >
> >
> > +----------------------------------------------------------------+
> >
> > Think B4U Print
> >
> > 1 ream of paper = 6% of a tree and 5.4kg CO2 in the atmosphere
> >
> > 3 sheets of A4 paper = 1 litre of water
> >
> > +----------------------------------------------------------------+
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
> >
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 28 Apr 2011 16:09:30 -0700
> From: Roberto Mera <rjmera at coas.oregonstate.edu>
> Subject: [gradsusr] Installing opengrads in x86_64 GNU/Linux
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <4DB9F3AA.1060809 at coas.oregonstate.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> All,
>
> I was trying to install opengrads in a x86_64 GNU/Linux machine and I
> got the message below. Where should I put/get this libraries? How do I
> compile grads so that it works?
>
> Thanks,
>
> Robert
>
> opengrads
>
> Welcome to the OpenGrADS Bundle Distribution
> --------------------------------------------
>
> For additional information enter "opengrads -h".
>
> Starting
>
> "/home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads
> -HC 1 " ...
>
>
> /home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads:
> error while loading shared libraries: libXaw.so.8: cannot open shared
> object file: No such file or directory
> maui.OCE.ORST.EDU 69:
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 28 Apr 2011 13:38:38 -1000
> From: "James T. Potemra" <jimp at hawaii.edu>
> Subject: Re: [gradsusr] Installing opengrads in x86_64 GNU/Linux
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <4DB9FA7E.9060209 at hawaii.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Roberto:
>
> Try this, from the INSTALL notes:
>
> > grads: error while loading shared libraries: libXaw.so.7: cannot open
> > shared obj
> > ect file: No such file or directory
> >
> > for libXaw (or any other library) is because your system lacks this
> > standard shared library. We have include many of these shared
> > libraries used by GrADS under
> >
> > Contents/Linux/Versions/2.0.a5.oga.3/x86_64/libs
> >
> > If it complains about some missing shared, copy each missing shared
> > library (and only these) from this directory to
> >
> > Contents/Linux/Versions/2.0.a5.oga.3/x86_64/gex
> >
> > and try again from Contents/.
>
> Jim
>
>
> On 4/28/11 1:09 PM, Roberto Mera wrote:
> > All,
> >
> > I was trying to install opengrads in a x86_64 GNU/Linux machine and I
> > got the message below. Where should I put/get this libraries? How do I
> > compile grads so that it works?
> >
> > Thanks,
> >
> > Robert
> >
> > opengrads
> >
> > Welcome to the OpenGrADS Bundle Distribution
> > --------------------------------------------
> >
> > For additional information enter "opengrads -h".
> >
> > Starting
> >
> "/home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads
> > -HC 1 " ...
> >
> >
> /home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads:
> > error while loading shared libraries: libXaw.so.8: cannot open shared
> > object file: No such file or directory
> > maui.OCE.ORST.EDU 69:
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 29 Apr 2011 09:08:34 +0430
> From: saeed bayat <saeedbayat7276 at gmail.com>
> Subject: Re: [gradsusr] Installing opengrads in x86_64 GNU/Linux
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <BANLkTik42mdM_zzcR6cCsXT5GAaAzdmtmw at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Robert
>
> just try this command for open "opengrads"
>
> first: copy the "Content" folder to outside of "opengrads" folder, then
>
> /home/ which path it is/Content/opengrads-------------------> Enter
>
> I hope this will hwlp you
>
> Abdolhalim bayat
> M.Sc student of Climatology
> Ferdowsi University of mashhad(Iran)
>
> On Fri, Apr 29, 2011 at 3:39 AM, Roberto Mera
> <rjmera at coas.oregonstate.edu>wrote:
>
> > All,
> >
> > I was trying to install opengrads in a x86_64 GNU/Linux machine and I
> > got the message below. Where should I put/get this libraries? How do I
> > compile grads so that it works?
> >
> > Thanks,
> >
> > Robert
> >
> > opengrads
> >
> > Welcome to the OpenGrADS Bundle Distribution
> > --------------------------------------------
> >
> > For additional information enter "opengrads -h".
> >
> > Starting
> >
> >
> "/home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads
> > -HC 1 " ...
> >
> >
> >
> /home/server/pi/homes/rjmera/grads-2.0.a9.oga.1/Contents/Linux/Versions/2.0.a9.oga.1/x86_64/grads:
> > error while loading shared libraries: libXaw.so.8: cannot open shared
> > object file: No such file or directory
> > maui.OCE.ORST.EDU 69:
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://gradsusr.org/pipermail/gradsusr/attachments/20110429/65cefb32/attachment-0001.html
>
> ------------------------------
>
> Message: 5
> Date: Fri, 29 Apr 2011 18:02:14 +0530
> From: sushant puranik <sushantpuranik at gmail.com>
> Subject: Re: [gradsusr] how to find typhoon center via minloc function
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <BANLkTinDFzmd=ck1Zc_O7KdK0O1JJPikEQ at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello Charles
> I want to make a jet stream plot. Can i make it with the help of hurricane
> center script by changing minloc and min to maxloc and max.
> any suggestion?
>
> thanks
>
> Sushant
>
> On Wed, Jan 5, 2011 at 1:01 AM, Charles Seman <Charles.Seman at noaa.gov
> >wrote:
>
> > Jie,
> >
> > Attached is a file File_Error_1_Grads_1.9-Plot_tc_shi.gs.txt containing
> the
> > text from an email exchange to the GrADS Listserv between Joe Covert and
> > Diane Stokes on 9/13/2004 -- on 4/27/06, found via a Google search for "
> > plot_tc_shi.gs": http://caos.iisc.ernet.in/gslib/plot_tc_shi.gs
> >
> > The attached GrADS script plot_hurricane_center3.gs (along with
> pause.gsf,
> > aGrADS script function used by the plot script) is a locally modified
> > version derived from Joe Covert's script "plot_tc_shi.gs" (
> > Joe.Covert at noaa.gov) which was posted to the GrADS Listserv on 9/13/2004
> > (his script was named plot_tc_shi.gs) and code from
> hurricane_tracking.txt
> > (taken from an email exchange posted to the GrADS Listserv by Kun-Hsuan
> Chou
> > and Arturo Caracas Uribe in Oct, 2004)...
> >
> > Please find below code from hurricane_tracking.txt (taken from an email
> > exchange posted to the GrADS Listserv by Kun-Hsuan Chou and Arturo
> Caracas
> > Uribe in Oct, 2004) illustrating a technique for finding max wind in a 2D
> > field... and below that some code from attached script
> > plot_hurricane_center3.gs to find the min sea-level pressure in a 2D
> > field...
> >
> > code from Kun-Hsuan Chou to find maximum wind speed from
> > hurricane_tracking.txt:
> > ---
> > 'd maxloc(max(mag(u,v),lon=120,lon=130),lat=15,lat=25)'
> > line=sublin(result,2)
> > ygrd=subwrd(line,4)
> > 'd maxloc(max(mag(u,v),lat=15,lat=25),lon=120,lon=130)'
> > line=sublin(result,2)
> > xgrd=subwrd(line,4)
> > 'set x 'xgrd
> > lonval = subwrd(result,4)
> > 'set y 'ygrd
> > latval = subwrd(result,4)
> > 'q w2xy 'lonval' 'latval
> > xpos = subwrd(result,3)
> > ypos = subwrd(result,6)
> > 'draw mark 1 'xpos' 'ypos' .2'
> > ---
> >
> > sample code from plot_hurricane_center3.gs to find hurricane center (see
> > script for supporting code):
> > ---
> > *
> > * find minimum "pressure" within box area (x1,x2), (y1,y2)...
> > *
> > 'set x 'x1
> > 'set y 'y1
> > 'set z 1'
> > 'set t 'tt
> > 'set gxout print'
> > nxp = x2-x1+1
> > * say ' nxp = 'nxp
> > nyp = y2-y1+1
> > * say ' nyp = 'nyp
> > 'd minloc(min(psl,y='y1',y='y2'),x='x1',x='x2')'
> > rec=sublin(result,nxp+3)
> > xc=subwrd(rec,1)
> > 'd minloc(min(psl,x='x1',x='x2'),y='y1',y='y2')'
> > rec=sublin(result,nyp+3)
> > yc=subwrd(rec,1)
> > say
> > say 'location of minimum "pressure"...'
> > say
> > say ' (xc,yc) = ('xc','yc')'
> > *
> > * find "world" coordinates of (xc,yc) and convert "world" coordinates
> > * to "xy" coordinates for plotting track of hurricane center...
> > *
> > 'set x 'xc
> > lonval = subwrd(result,4)
> > 'set y 'yc
> > latval = subwrd(result,4)
> > say ' (lonval,latval) = ('lonval','latval')'
> > 'q w2xy 'lonval' 'latval
> > xpos = subwrd(result,3)
> > ypos = subwrd(result,6)
> > say ' (xpos,ypos) = ('xpos','ypos')'
> > *
> > * write (xpos,ypos) to output file...
> > *
> > res = write (''hurricane.nf'','t = 'tt' xpos = 'xpos' ypos =
> 'ypos'')
> >
> > pause()
> > ---
> >
> > Please let me know if you have any questions.
> >
> > Hope this helps,
> > Chuck
> >
> > Jie TANG wrote:
> >
> >>
> >> hi,grads folks ,
> >> I am using grads v1.9, trying to find the center of typhoon via minloc
> >> function.
> >> the key script is shown as below:
> >> slplat=min(slp,lat=19,lat=26)
> >> tclon=minloc(slplat,lon=119,lon=126)
> >> slplon=min(slp,lon=119,lon=126)
> >> tclat=minloc(slplon,lat=19,lat=26)
> >>
> >> but grads tell me that "function not found min " and when i changed my
> >> script to be :
> >> tclat=min(minloc(slpt,lon=119,lon=126), lat=19,lat=26)
> >> tclon=min(minloc(slpt, lat=19,lat=26 )lon=119,lon=126)
> >>
> >>
> >> how can i finx my scrpit ? thank you .:)
> >> --
> >>
> >> TANG Jie
> >> Email: totangjie at gmail.com <mailto:totangjie at gmail.com>
> >>
> >> Tel: 0086-2154896104
> >> Shanghai Typhoon Institute,China
> >> ------------------------------------------------------------------------
> >>
> >> _______________________________________________
> >> gradsusr mailing list
> >> gradsusr at gradsusr.org
> >> http://gradsusr.org/mailman/listinfo/gradsusr
> >>
> >>
> >
> > --
> >
> > Please note that Charles.Seman at noaa.gov should be considered my NOAA
> > email address, not cjs at gfdl.noaa.gov.
> >
> > ********************************************************************
> > Charles Seman Charles.Seman at noaa.gov
> > U.S. Department of Commerce / NOAA / OAR
> > Geophysical Fluid Dynamics Laboratory voice: (609) 452-6547
> > 201 Forrestal Road fax: (609) 987-5063
> > Princeton, NJ 08540-6649 http://www.gfdl.noaa.gov/~cjs/
> > ********************************************************************
> >
> > "The contents of this message are mine personally and do not reflect any
> > official or unofficial position of the United States Federal Government,
> > the United States Department of Commerce, or NOAA."
> >
> >
> >
> > worked great ... thanks. joe
> >
> > Diane Stokes wrote:
> >
> > > Joe,
> > >
> > > Read works fine for me in 1.9.
> > >
> > > I think this is the issue where 'pull' in 1.9 throws in a carriage
> > > return. The read statement is not getting the exact filename.
> > >
> > > Try adding:
> > > file=sublin(file,1)
> > > after each:
> > > pull file
> > >
> > > Diane
> > >
> > > Joe Covert wrote:
> > >
> > >> There appears to be a problem with version 1.9 of GrADS "read"
> function.
> > >>
> > >> The plot_tc_shi.gs script (see below) uses the read function to open
> > the
> > >> track data file and the program gives the subject error message "File
> > >> Error 1".
> > >>
> > >> jc
> > >>
> > >>
> > >> * Script to draw an hurricane-track plot.
> > >> * Does little error checking on the input file.
> > >> * Assumes the input file is set up as follows:
> > >> *
> > >> * Line 1: Title
> > >> * Line 2: Drawing primitives for marks: marktype size
> > >> * Line 3: Drawing primitives for lines: color style thickness
> > >> * Line 4: Starting hour and the interval of plotting points
> > >> * e.g., 0 6 means that track starts at 0 hour and mark
> > >> * will be plotted every 6 hours.
> > >> * Rest of lines: hour long. lat.
> > >> * e.g., 0 -70.5 25.0
> > >> * 6 -71.8 25.2
> > >> * :
> > >> * :
> > >> *
> > >> * Also assumes that a file has been opened (any file, doesn't
> > >> * matter -- the set command doesn't work until a file has been
> > >> * opened).
> > >> *
> > >>
> > >> function main()
> > >>
> > >> * 'clear'
> > >>
> > >> 'open dummy.ctl'
> > >> 'set lat 20 50'
> > >> 'set lon -90 -30'
> > >> 'set mpdset hires'
> > >> 'set poli on'
> > >> 'draw map'
> > >>
> > >>
> > >> say 'Enter File Name: (type q to stop)'
> > >> pull fname
> > >>
> > >> while (fname != 'q')
> > >>
> > >> * Read the 1st record: Title
> > >>
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> if (rc>0)
> > >> say 'File Error 1'
> > >> return
> > >> endif
> > >> title = sublin(ret,2)
> > >> say title
> > >>
> > >> * Read the drawing primitives
> > >>
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> if (rc>0)
> > >> say 'File Error 2'
> > >> return
> > >> endif
> > >> dpline = sublin(ret,2)
> > >> marktype = subwrd(dpline,1)
> > >> marksize = subwrd(dpline,2)
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> if (rc>0)
> > >> say 'File Error 3'
> > >> return
> > >> endif
> > >> dpline = sublin(ret,2)
> > >> lcolor = subwrd(dpline,1)
> > >> lstyle = subwrd(dpline,2)
> > >> lthick = subwrd(dpline,3)
> > >> say ' marktype, marksize, lcolor, lstyle and lthick:'
> > >> say ' 'marktype ' ' marksize ' ' lcolor ' ' lstyle ' ' lthick
> > >>
> > >> * Read starting hour and the interval hours of plotting points
> > >>
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> if (rc>0)
> > >> say 'File Error 4'
> > >> return
> > >> endif
> > >> dhour = sublin(ret,2)
> > >> start = subwrd(dhour,1)
> > >> jump = subwrd(dhour,2)
> > >> say ' starting hour and the interval hours of plotting points:'
> > >> say ' 'start' 'jump
> > >>
> > >> * Read all data points
> > >>
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> while (rc = 0)
> > >> loc = sublin(ret,2)
> > >> hour = subwrd(loc,1)
> > >> dlong.hour = subwrd(loc,2)
> > >> dlat.hour = subwrd(loc,3)
> > >> * prompt ' hour ' hour ' are read,'
> > >> * say ' long=' dlong.hour ' lat=' dlat.hour
> > >> ret = read(fname)
> > >> rc = sublin(ret,1)
> > >> endwhile
> > >>
> > >> if (rc!=2 & rc!=0)
> > >> say 'File Error 5, rc=' rc
> > >> return
> > >> endif
> > >>
> > >> endhour = hour
> > >> say ' endhour=' endhour
> > >>
> > >> * Plotting
> > >>
> > >> 'set line 'lcolor' 'lstyle' 'lthick
> > >> 'query w2xy 'dlong.start' 'dlat.start
> > >> xprev = subwrd(result,3)
> > >> yprev = subwrd(result,6)
> > >> 'draw mark 'marktype' 'xprev' 'yprev' 'marksize
> > >> next = start+jump
> > >> while (next <= endhour)
> > >> * say ' 'dlong.start' 'dlat.start
> > >> 'query w2xy 'dlong.next' 'dlat.next
> > >> xnext = subwrd(result,3)
> > >> ynext = subwrd(result,6)
> > >> 'draw line 'xprev' 'yprev' 'xnext' 'ynext
> > >> * say ' 'xprev' 'yprev' 'xnext' 'ynext
> > >> 'draw mark 'marktype' 'xnext' 'ynext' 'marksize
> > >> next = next+jump
> > >> xprev = xnext
> > >> yprev = ynext
> > >> endwhile
> > >>
> > >> say fname ' is working fine.'
> > >>
> > >> * read in the filename to be plotted next
> > >>
> > >> say 'Enter File Name: (type q to stop)'
> > >> pull fname
> > >>
> > >> endwhile
> > >>
> >
> >
> > *----------------------------------------------------------------------
> > *
> > * Adapted from plot_hurricane_center2c.gs, which was adapted from:
> > *
> > * (1) "plot_hurricane_center2[a][b].gs" (from "plot_hurricane_center.gs
> > "),
> > * locally modified versions derived from Joe Covert's script
> > * "plot_tc_shi.gs" (Joe.Covert at noaa.gov), which was posted to the
> > * GrADS Listserv on 9/13/2004 (his script was named plot_tc_shi.gs)
> > * on 4/27/06, found via a Google search for "plot_tc_shi.gs":
> > * http://caos.iisc.ernet.in/gslib/plot_tc_shi.gs
> > *
> > * (2) code in "hurricane_tracking.txt" (taken from an email exchange
> > * posted to the GrADS Listserv by Kun-Hsuan Chou and
> > * Arturo Caracas Uribe in Oct, 2004)
> > *
> > *
> > * To use: grads -l
> > *
> > *----------------------------------------------------------------------
> >
> > function main()
> >
> > 'reinit'
> >
> > ************************************************************************
> > * Allow external GrADS functions
> > ************************************************************************
> >
> > rc = gsfallow("on")
> >
> > ************************************************************************
> > * Define dataset file information and plotting limits for base map...
> > ************************************************************************
> >
> > ** nc_file1 = ''
> > ** nc_file2 = ''
> > ** nc_file3 = ''
> > ** nc_file = ''nc_file1' 'nc_file2' 'nc_file3''
> > nc_file = 'your_netCDF_file'
> >
> > lon1 = 298 ; lon2 = 308
> > lat1 = 20 ; lat2 = 25
> >
> > ************************************************************************
> > * Legend captions, colors, and marks for the plots
> > ************************************************************************
> >
> > ** nmodels = 1
> > ** model.1 = 'isabel_ras'
> > ** model.2 = 'isabel_isotke'
> > ** model.3 = 'isabel_my25'
> >
> > ** titles.1 = model.1 ; colors.1 = 2 ; marks.1 = 2
> > ** titles.2 = model.2 ; colors.2 = 3 ; marks.2 = 2
> > ** titles.3 = model.3 ; colors.3 = 4 ; marks.3 = 2
> > ***
> > *** Define the legend plotter input...
> > ***
> > ** titles = '-t' ; colors = '-c' ; marks = '-m' ; lines = '-l'
> > ** n=1
> > ** while ( n <= nmodels )
> > ** titles = ''titles' "'titles.n'"'
> > ** colors = ''colors' 'colors.n
> > ** marks = ''marks' "'marks.n'"'
> > ** lines = ''lines' 1'
> > ** n=n+1
> > ** endwhile
> >
> > ** legend_info = ''colors' 'lines' 'marks' 'titles' -p'
> >
> > nmodels = 1
> > model.1 = 'title_name_for_your_netCDF_dataset'
> >
> > titles.1 = model.1 ; colors.1 = 2 ; marks.1 = 2
> > *
> > * Define the legend plotter input...
> > *
> > titles = '-t' ; colors = '-c' ; marks = '-m' ; lines = '-l'
> > n=1
> > while ( n <= nmodels )
> > titles = ''titles' "'titles.n'"'
> > colors = ''colors' 'colors.n
> > marks = ''marks' "'marks.n'"'
> > lines = ''lines' 1'
> > n=n+1
> > endwhile
> >
> > legend_info = ''colors' 'lines' 'marks' 'titles' -p'
> >
> > * ...other drawing primitives
> >
> > marksize = 0.1
> >
> > lstyle = 1 ; lthick = 5
> >
> > ************************************************************************
> > * Use "cbar_line" or "cbar_line_box"?
> > ************************************************************************
> >
> > legend_plotter = 'cbar_line'
> > * legend_plotter = 'cbar_line_box'
> >
> > ************************************************************************
> > * Plot page limits
> > ************************************************************************
> >
> > plot_vpage = '0 11 0 8.5'
> > plot_area = '1 10 1 7.5'
> >
> > xl = subwrd(plot_area,1) ; xr = subwrd(plot_area,2)
> > yb = subwrd(plot_area,3) ; yt = subwrd(plot_area,4)
> >
> > xc = xl + (xr-xl)/2
> >
> > ************************************************************************
> > * GrADS metafile output...
> > ************************************************************************
> >
> > 'enable print hurricane_track.gx'
> >
> > *-----------------------------------------------------------------------
> > * Define and plot track of minimum surface pressure for each dataset...
> > *-----------------------------------------------------------------------
> >
> > nf=1
> > while ( nf <= nmodels )
> >
> > * Open dataset file and define parameters...
> >
> > fname = subwrd(nc_file,nf)
> > 'sdfopen 'fname
> > 'set dfile 'nf
> > 'q file'
> > rec3 = sublin(result,3) ; binary_file = subwrd(rec3,2)
> > say
> > say
> > say '*** 'binary_file' ***'
> > say
> > rec5 = sublin(result,5)
> > nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9) ; nt =
> > subwrd(rec5,12)
> >
> > if( nf = 1 )
> >
> > * Plot base map...
> >
> > plot_base_map(plot_vpage,plot_area,lon1,lon2,lat1,lat2)
> >
> > endif
> >
> > * Define locations of "hurricane center" for plotting points, and write
> > * locations out to ASCII text file for read-in for plotting track
> later...
> >
> > hurricane.nf = 'hurricane_'nf'.txt'
> >
> > ts=2
> > tt=ts
> > while ( tt <= nt )
> > 'set t 'tt
> > say
> > say '---------'
> > say ' tt = 'tt
> > say '---------'
> > say
> > 'set lon 'lon1' 'lon2
> > 'set lat 'lat1' 'lat2
> > 'set z 1'
> > *
> > * here is where you put in the name of your sea-level pressure variable:
> > *
> > 'define psl = name_of_your_sea_level_pressure_variable'
> > 'set gxout shaded'
> > 'd psl'
> > *
> > * following interactive "box location" code adapted from "
> cbar_line_box.gs
> > "...
> > *
> > say 'Click where you want the left upper corner of the box'
> > 'query bpos'
> > xb1o = subwrd(result,3)
> > yb2o = subwrd(result,4)
> > say 'Click where you want the right lower corner of the box'
> > 'query bpos'
> > xb2o = subwrd(result,3)
> > yb1o = subwrd(result,4)
> >
> > say
> > say '...left upper corner of the box at X Y: 'xb1o' 'yb2o
> > say '...right lower corner of the box at X Y: 'xb2o' 'yb1o
> > *
> > * draw box to show specified area for defining hurricane center...
> > *
> > 'set line 1 1'
> > 'draw rec 'xb1o' 'yb1o' 'xb2o' 'yb2o
> > *
> > * convert box "xy" coordinates to "grid" coordinates
> > * for finding minimum "pressure" (hurricane center)...
> > *
> > 'q xy2gr 'xb1o' 'yb2o
> > x1o = subwrd(result,3) ; x1 = math_int(x1o+0.5)
> > y2o = subwrd(result,6) ; y2 = math_int(y2o+0.5)
> > 'q xy2gr 'xb2o' 'yb1o
> > x2o = subwrd(result,3) ; x2 = math_int(x2o+0.5)
> > y1o = subwrd(result,6) ; y1 = math_int(y1o+0.5)
> > say
> > say 'Specified grid coordinates (x1o,x2o), (y1o,y2o) from box,'
> > say 'rounded to (x1,x2), (y1,y2) for finding minimum "pressure"...'
> > say
> > say ' (x1o,x2o) = ('x1o','x2o') --> (x1,x2) = ('x1','x2')'
> > say ' (y1o,y2o) = ('y1o','y2o') --> (y1,y2) = ('y1','y2')'
> > *
> > * find minimum "pressure" within box area (x1,x2), (y1,y2)...
> > *
> > 'set x 'x1
> > 'set y 'y1
> > 'set z 1'
> > 'set t 'tt
> > 'set gxout print'
> > nxp = x2-x1+1
> > * say ' nxp = 'nxp
> > nyp = y2-y1+1
> > * say ' nyp = 'nyp
> > 'd minloc(min(psl,y='y1',y='y2'),x='x1',x='x2')'
> > rec=sublin(result,nxp+3)
> > xc=subwrd(rec,1)
> > 'd minloc(min(psl,x='x1',x='x2'),y='y1',y='y2')'
> > rec=sublin(result,nyp+3)
> > yc=subwrd(rec,1)
> > say
> > say 'location of minimum "pressure"...'
> > say
> > say ' (xc,yc) = ('xc','yc')'
> > *
> > * find "world" coordinates of (xc,yc) and convert "world" coordinates
> > * to "xy" coordinates for plotting track of hurricane center...
> > *
> > 'set x 'xc
> > lonval = subwrd(result,4)
> > 'set y 'yc
> > latval = subwrd(result,4)
> > say ' (lonval,latval) = ('lonval','latval')'
> > 'q w2xy 'lonval' 'latval
> > xpos = subwrd(result,3)
> > ypos = subwrd(result,6)
> > say ' (xpos,ypos) = ('xpos','ypos')'
> > *
> > * write (xpos,ypos) to output file...
> > *
> > res = write (''hurricane.nf'','t = 'tt' xpos = 'xpos' ypos =
> 'ypos'')
> >
> > pause()
> > *
> > * erase box showing area for defining hurricane center...
> > *
> > * 'set line 0 1'
> > * 'draw rec 'xb1o' 'yb1o' 'xb2o' 'yb2o
> > tt=tt+1
> > endwhile
> >
> > res = close (''hurricane.nf'')
> >
> > nf=nf+1
> > endwhile
> >
> > * Clear frame and re-plot base map...
> >
> > plot_base_map(plot_vpage,plot_area,lon1,lon2,lat1,lat2)
> >
> > * Plot track(s)...
> >
> > nf=1
> > while ( nf <= nmodels )
> >
> > * Specify drawing primitives
> >
> > marktype = marks.nf
> > lcolor = colors.nf
> >
> > say ' marktype, marksize, lcolor, lstyle and lthick:'
> > say ' 'marktype ' ' marksize ' ' lcolor ' ' lstyle ' ' lthick
> >
> > tt=ts
> > *
> > * read (xpos,ypos) from ASCII text input file...
> > *
> > res = read(''hurricane.nf'') ; rc = sublin(res,1)
> > if( rc != 0 )
> > say '"read" status = 'rc
> > exit
> > endif
> > rec = sublin(res,2) ; say '"hurricane.'nf'" record: 'rec
> > xc = subwrd(rec,6) ; yc = subwrd(rec,9)
> >
> > 'set line 'lcolor' 'lstyle' 'lthick
> > 'draw mark 'marktype' 'xc' 'yc' 'marksize
> > tt = tt+1
> > while ( tt <= nt )
> > res = read(''hurricane.nf'') ; rc = sublin(res,1)
> > if( rc != 0 )
> > say '"read" status = 'rc
> > exit
> > endif
> > rec = sublin(res,2) ; say '"hurricane.'nf'" record: 'rec
> > xn = subwrd(rec,6) ; yn = subwrd(rec,9)
> > say ' 'xc' 'yc' 'xn' 'yn
> > 'draw line 'xc' 'yc' 'xn' 'yn
> > 'draw mark 'marktype' 'xn' 'yn' 'marksize
> > tt=tt+1
> > xc = xn
> > yc = yn
> > endwhile
> >
> > nf=nf+1
> > endwhile
> >
> > say
> > say '...plot legend'
> > ''legend_plotter' -x 3 -y 6 'legend_info
> > say
> >
> > 'print'
> > 'disable print'
> >
> > say
> > say '************************************************'
> > say ' Finished with this script.'
> > say '************************************************'
> > say
> >
> > return
> >
> > function plot_base_map(plot_vpage,plot_area,lon1,lon2,lat1,lat2)
> >
> > * Plots base map...
> >
> > 'c'
> > 'set vpage 'plot_vpage
> > 'set parea 'plot_area
> > 'set lon 'lon1' 'lon2
> > 'set lat 'lat1' 'lat2
> > 'set mproj latlon'
> > 'set mpt * 1 1 5'
> > 'set mpdset hires'
> > 'set poli on'
> > * 'set grid on'
> > 'set grads off'
> > 'set gxout contour'
> > 'draw map'
> >
> > * add lon/lat lines...
> >
> > 'set ccolor 1'
> > 'set cstyle 5' ; 'd lon'
> > 'set cstyle 5' ; 'd lat'
> >
> > * add title, x- and y-labels...
> >
> > 'draw title \\ Track of Minimum Surface Pressure'
> > 'draw xlab Longitude \\'
> > 'draw ylab \\ Latitude'
> >
> > return
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
> >
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://gradsusr.org/pipermail/gradsusr/attachments/20110429/e2936a21/attachment.html
>
> ------------------------------
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> End of gradsusr Digest, Vol 14, Issue 62
> ****************************************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110429/cd22a874/attachment-0003.html
More information about the gradsusr
mailing list