[gradsusr] Trend line in Grads

[Anubhav Choudhary]

Hi Carlos,
This is the example you had posted about a year ago  for plotting trend-

'reinit'

'sdfopen sst.mnmean.nc'

'set t 1 last'

'ltrend sst sstl s e'

'define new_variable=aave(sstl,lon=0,lon=360,lat=-88,lat=88)'

'd a'

Needed one help in plotting distribution of trend in space (at each grid
point) showing significance also if possible. The ltrend script, qdims.gsf
and the example you have mentioned is working. but in your example in the
4th line 'ltrend sst sstl s e' , sst is the variable the trend of which i
want to calculate, i understand but what are sstl, s, and e. here which is
the regression coefficient(b) which i need to show the trend(slope). also
in the last line what is 'a' in 'd a'. you have not defined it earlier.
Please tell me.
Thanks
Anubhav


On Mon, Dec 1, 2014 at 11:04 PM, Carlos Batista <krlosbatist at gmail.com>
wrote:

> Hi Debanjana Das!!! How are u
>
> The ltrend is possible use with show example. You will need use a
> dependency call qdims.gsf (...)
>
> See here: http://www.atmos.umd.edu/~bguan/grads/GrADS_Scripts.html
>
>
> 'reinit'
>
> 'sdfopen sst.mnmean.nc'
>
> 'set t 1 last'
>
> 'ltrend sst sstl s e'
>
> 'define new_variable=aave(sstl,lon=0,lon=360,lat=-88,lat=88)'
>
> 'd a'
>
> Cheers!
>
> 2014-12-01 7:25 GMT-02:00, Debanjana Das <debanjanadas88 at gmail.com>:
> > how to use this function? what is the command line?
> >
> > On Mon, Dec 1, 2014 at 2:24 PM, Carlos Batista <krlosbatist at gmail.com>
> > wrote:
> >
> >> Hi
> >>
> >> You can use a ready function (Ltrend) that is on this site!
> >>
> >> http://www.atmos.umd.edu/~bguan/grads/GrADS_Scripts.html
> >>
> >> Calculate your variable and then give display!!
> >>
> >> Cheers!
> >>
> >>
> >> 2014-12-01 6:42 GMT-02:00 gopika suresh <gopikasurvay at gmail.com>:
> >>
> >>> How to include a trend line in grads. Please replay
> >>>
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-- 
Anubhav Choudhary
Ph.D. Student (UGC-JRF)
School of Environmental Sciences
Jawaharlal Nehru University, New Delhi

Ph: +91-8527706122
Email: yoursanubhav at gmail.com
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