Re: [ferret_users] regression issue: one variable VS another variables

[yangxing zheng <yangxingz@xxxxxxxxx>]

Hi David,

   I did it the same way you show here. But it has a marker on the line plot.

   Thanks a lot.

   yangxing


--- On Thu, 3/19/09, David Wang <climater@xxxxxxxxx> wrote:

> From: David Wang <climater@xxxxxxxxx>
> Subject: Re: [ferret_users] regression issue: one variable VS another  variables
> To: "yangxing zheng" <yangxingz@xxxxxxxxx>
> Cc: ferret_users@xxxxxxxx
> Date: Thursday, March 19, 2009, 2:04 AM
> Hi Yangxing,
> 
> Here is an example that you can reproduce:
> 
> yes? use "
> http://iridl.ldeo.columbia.edu/SOURCES/.Indices/.nino/.NCEP_OIv2/dods";
> yes? sh d
>      currently SET data sets:
>     1>
> http://iridl.ldeo.columbia.edu/SOURCES/.Indices/.nino/.NCEP_OIv2/dods
> (default)
>  name     title                             I         J    
>     K         L
>  NINO12   NINO12                           ...       ...   
>    ...
> 1:328
>  NINO3    NINO3                            ...       ...   
>    ...
> 1:328
>  NINO34   NINO34                           ...       ...   
>    ...
> 1:328
>  NINO4    NINO4                            ...       ...   
>    ...
> 1:328
> 
> yes? let p = nino3
> yes? let q = nino34
> yes? go regresst
> yes? plot/vs p,q
> yes? plot/vs/nolab/over/line/sym=dot p,qhat
> 
> OK, I admit it's not really a straight line, but a
> series of connected dots.
> Does anyone out there know if PLOT/VS can have no marker?
> 
> D.
> 
> On Wed, Mar 18, 2009 at 1:19 PM, yangxing zheng
> <yangxingz@xxxxxxxxx> wrote:
> 
> > Hi,
> >
> >  Thanks for help. But I am still not clear.
> >
> >  My question is: sst, a function of time, is an
> independent variable. and u
> > is a dependent variable, which is also a function of
> time. How can we make a
> > line plot when u is regressed onto sst? Apparently sst
> as an independent
> > variable is not originally monotonic, it has be
> reshaped, right?
> >
> >  The FAQ indicates that regresst only describes how to
> regress a variable
> > (a function of time) into the independent variable T,
> Am I right? For
> > example, we can do regression sst vs T using
> regresst.jnl
> >
> >  The attached figure is a scatter plot of u (in
> Y-coordinate) VS sst ( in
> > X-coordinate). Can you explain more details for my
> case?
> >
> >  yx
> >
> >
> > --- On Wed, 3/18/09, David Wang
> <climater@xxxxxxxxx> wrote:
> >
> > > From: David Wang <climater@xxxxxxxxx>
> > > Subject: Re: [ferret_users] regression issue: one
> variable VS another
> > variables
> > > To: "yangxing zheng"
> <yangxingz@xxxxxxxxx>
> > > Cc: ferret_users@xxxxxxxx
> > > Date: Wednesday, March 18, 2009, 8:29 AM
> > > Hi Yangxing,
> > >
> > > regresst.jnl is what you need. Please follow this
> FAQ:
> > >
> > >
> http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/analysis/regressions.html
> > >
> > > It's the least square fit.
> > >
> > > HTH,
> > > D.
> > >
> > > On Tue, Mar 17, 2009 at 7:56 PM, yangxing zheng
> > > <yangxingz@xxxxxxxxx> wrote:
> > >
> > > > Hi,
> > > >
> > > >  I do have two variables like area averaged
> sst, and u
> > > (zonal winds) from l
> > > > = 1:100 (for simple case, sst and u only has
> one
> > > dimension of time)
> > > >
> > > >  we can make scatter plot
> > > >  plot/vs sst,u
> > > >
> > > >  Now I want to see how sensitive of u to
> sst, we
> > > usually plot a line that
> > > > describe the relationship between u and sst.
> How can
> > > we make it in ferret?
> > > >
> > > >  Attached is one example of scatter plot.
> > > >
> > > >   Thanks.
> > > >
> > > >   yx
> > > >
> > > >
> > > >
> > >
> > >
> > > --
> > > life grows, death doesn't. there is no dress
> rehearsal.
> >
> >
> >
> >
> 
> 
> 
> -- 
> life grows, death doesn't. there is no dress rehearsal.