Re: [ferret_users] remove zero from x-axis

[mick spillane <mick.spillane@xxxxxxxx>]

Hi Steve,
   To extend Jaison's removal of the 0.0 label, what you probable need 
is to "white out" the portion of the plot which represents linear 
interpolation between the values at -1 and +1.
Here is a simple way to do that:

def axis/x xax={-6,-5,-4,-3,-2,-1,1,2,3,4,5,6}
def axis/y=50:1000:50 yax
let var =sin(x[gx=xax]) + sin(y[gy=yax])
fill/set var  ; ppl xfor (f4.1) ; ppl fill
poly/o/nolab/pal=white {-0.5,0.5,0.5,-0.5},{50,50,1000,1000}

A less easy, though more "correct", way would be to define the x-axis 
with edges that correctly define the range about x=+1 to which the value 
there applies.  My demo in the last line assumes the lower edge is at 
0.5 (and -0.5 for the upper edge for the value at x=-1).

Good luck,
Mick
-----------------------------------------
guimond@coaps.fsu.edu wrote:
> Hi Jaison,
>  Thank you for your suggestion.  This procedure basically "whites out" 
> the 0.0, which is good but not ideally what I was looking for.  There 
> is a large gap between -1 and 1 where the "0.0" used to be and that 
> may be interpreted wrongly when someone looks at the graph.  It looks 
> like 0.0 has values associated with it, when in reality it does not 
> exist on my axis.  I may just assign missing values to 0.0, so there 
> is a line of white above 0.0.  Any other suggestions?
>
> Steve
>
>
>
> Quoting Jaison Kurian <jaison@caos.iisc.ernet.in>:
>
> > Hi Steve,
> >          A weird solution to your problem...make a label
> > "0.0" exactly at the postion of X axis 0 in the background
> > color ! Here is an example..
> >
> > For the default plot, the background color is white. So
> > define a new "ppl color" with values "99,99,99" (which
> > is better than using "100,100,100" with most of the file
> > formats)
> >
> >  def axis/x xax={-6,-5,-4,-3,-2,-1,1,2,3,4,5,6}
> >  def axis/y=50:1000:50 yax
> >
> >  let var =sin(x[gx=xax]) + sin(y[gy=yax])
> >
> >  fill/set var
> >    ppl xfor (f4.1)
> >  ppl fill
> >  ppl color 6,99,99,99
> >  label 0,0,0,0,0.10,@C0060.0  ! no space between "@C006" and "0.0"
> >
> > You may have to tune the "Y" value for label to get it at right
> > position.
> >
> > Hope this helps,
> >
> > Jaison
> >
> >
> > On Wed, 11 Oct 2006 guimond@coaps.fsu.edu wrote:
> >
> > > Hi Ferreters,
> > >   I defined an xaxis like so:
> > >
> > > def axis/x xax={-6,-5,-4,-3,-2,-1,1,2,3,4,5,6}
> > >
> > > When I go to plot my data, "0" still shows up on the xaxis which I
> > > would like to remove.  Any ideas?
> > >
> > > Thanks Much,
> > > Steve
> > >
> > > =======================================================
> > > Stephen R. Guimond
> > > Graduate Research Assistant
> > > Center for Ocean-Atmospheric Prediction Studies (COAPS)
> > > Tallahassee, FL 32304
> > > =======================================================
> > >
> > >
> > > ----------------------------------------------------------------
>
>
> ----------------------------------------------------------------