[gradsusr] Trend line in Grads

[Carlos Batista]

Hi Teresa !!!

I never did significance calculations only for trend data ...

I think it's possible (...)

To make my calculations of significance I used the following

***CALCULO DA SIGNIFICANCIA 90%***
***cor=my variable
***387my temporal seria

'q pos'
'c'
'set grads off'
'define den=pow(cor,2)'
'define sig=abs(cor*sqrt(387/(1-den)))'

'set xaxis 0 360 40'
'set yaxis -88 88 20'


* 90% significancia
'set cmin 1.282'
'd sig'


Cheers!
Carlos


2014-12-01 16:09 GMT-02:00 Tereza Cavazos <tcavazos at cicese.mx>:

> Hi,
>
> Is it possible to calculate the statistical significance of the trend in
> Grads?
>
> Cheers,
>
> Tereza
>
> El 01/12/2014 09:34 a.m., Carlos Batista escribió:
> > 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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