[gradsusr] how to reveres latitudes in nc file

[Kishore Babu]

Thank you all, especially to Andrew as  I am very lazy and ncpdq is just
right for me ...

Thanks again..

Best wishes,

Kishore


On Wed, Mar 27, 2013 at 1:57 AM, Andrew Friedman <andfried at berkeley.edu>wrote:

> Another option is to use the NCO tool ncpdq:
>
> http://nco.sourceforge.net/nco.html#ncpdq-netCDF-Permute-Dimensions-Quickly
>
> Andrew
>
> On Mar 26, 2013, at 12:32 PM, Lee Byerle <lbyerle at yahoo.com> wrote:
>
> > Kishore,
> >
> > Below may also be helpful.  It is sample fortran code that can reverse
> the latitude indices, and writes back to binary (assuming .nc is first
> dumped to binary):
> > .
> > .
> > .
> > irec1=1
> > irec2=1
> >
> > do nvar=1,5   !Variables in binary file, with u-wind
> > if(nvar.eq.1) then
> >   do k=1,nk
> >     read(1,rec=irec1)vgrads  !read data in .nc file
> >     do i=1,ni
> >        do j=1,nj
> >            u(i,j,k)=vgrads(i,nj+1-j)               !reverse j-index
> >          enddo
> >       enddo
> >       irec1=irec1 + 1
> >      enddo
> >
> > c now write to file w/latitude (j-index) reversed:
> >
> > do k=1,nk
> >  do i=1,ni
> >    do j=1,nj
> >      var(i,j) = u(i,j,k)
> >     enddo
> >    enddo
> >    write(17,rec=irec2)var
> >    irec2=irec2 + 1
> > enddo
> > .
> > .
> > etc.
> >
> > The new binary output, with latitude starting at +90, can be viewed with
> a .ctl file using options yrev.
> >
> > Lee
> > From: Charles Seman - NOAA Federal <charles.seman at noaa.gov>
> > To: GrADS Users Forum <gradsusr at gradsusr.org>
> > Sent: Tuesday, March 26, 2013 1:09 PM
> > Subject: Re: [gradsusr] how to reveres latitudes in nc file
> >
> > Kishore,
> >
> > Have you tried the "yrev" option?
> > http://grads.iges.org/grads/gadoc/descriptorfile.html#OPTIONS
> >
> > You would make a GrADS data descriptor file to open the .nc file, and
> > include in the data descriptor file the line:
> > options yrev
> >
> > Hope this helps,
> > Chuck
> >
> > On 03/26/2013 01:40 AM, Kishore Babu wrote:
> > > Dear grads users,
> > >
> > > My nc file has latitudes as below
> > >
> > > latitude = -90, -87.5, -85, -82.5, -80, -77.5, -75, -72.5, -70, -67.5,
> -65,
> > >      -62.5, -60, -57.5, -55, -52.5, -50, -47.5, -45, -42.5, -40, -37.5,
> > > -35,
> > >      -32.5, -30, -27.5, -25, -22.5, -20, -17.5, -15, -12.5, -10, -7.5,
> -5,
> > >      -2.5, 0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30,
> > > 32.5,
> > >      35, 37.5, 40, 42.5, 45, 47.5, 50, 52.5, 55, 57.5, 60, 62.5, 65,
> > > 67.5, 70,
> > >      72.5, 75, 77.5, 80, 82.5, 85, 87.5, 90 ;
> > >
> > > But, I need to have latitudes in reveres such as below...
> > >
> > > latitude = 90, 87.5, 85, 82.5, 80, 77.5, 75, 72.5, 70, 67.5, 65, 62.5,
> 60,
> > >      57.5, 55, 52.5, 50, 47.5, 45, 42.5, 40, 37.5, 35, 32.5, 30, 27.5,
> 25,
> > >      22.5, 20, 17.5, 15, 12.5, 10, 7.5, 5, 2.5, 0, -2.5, -5, -7.5, -10,
> > > -12.5,
> > >      -15, -17.5, -20, -22.5, -25, -27.5, -30, -32.5, -35, -37.5, -40,
> > > -42.5,
> > >      -45, -47.5, -50, -52.5, -55, -57.5, -60, -62.5, -65, -67.5, -70,
> > > -72.5,
> > >      -75, -77.5, -80, -82.5, -85, -87.5, -90 ;
> > >
> > > Could you please anybody let me know how it is changed?
> > >
> > > Thank you in advance..
> > >
> > > Regards,
> > >
> > > Kishore
> > >
> > >
> > > _______________________________________________
> > > 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."
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> >
> >
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>
> Andrew Friedman
> Graduate Student, UC Berkeley Geography
> andfried at berkeley.edu
>
>
>
>
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