Re: fill_between : comments

[Jaison Kurian <jaison@xxxxxxxxxxxxxxxxxx>]

Hi Ansley,
            Infact the jnl file given at  
http://www.ferret.noaa.gov/Ferret/FAQ/custom_plots/fill_between.html 
works  fine. But still one more correction is required.

	Suppose we have Z_axis as "postive=down" depth axis like :

		DEFINE AXIS/Z=1:100:1/DEPTH z100

        & if we want to get lines along with the filled polygon ..like;

	   GO fill_between POLY/OVER/NOLABEL/LINE/PALETTE=blue a z100 b

        then we will have problem (we will get two polygons with an offset:
		filled one & lined one) with present script.

      This is may be due to the "fill" and "line" needs the z-axis sign
           in two ways in case of "positive down" z-axis.

      So first we can get the filled plot and then lined one (if needed)
                         
      slight change in the script....

       $1/($FB_orient)/coord_ax=($FBbar_ax)/nolab  ($FB_mult)*FBx4_1, ($FB_mult)
*FBy4_1 ! filled polygone
       $1/($FB_orient)/coord_ax=($FBbar_ax)/nolab  FBx4_1, ($FB_mult)*FBy4_1 !li
ned polygon

      will take care of the "positive down" z-axis (and usual x/y/t-axes).
       But now "positive up" z-axis will have problem.

      suggections

       1. one more argumnet to take care of positive up z-axis?? 
       2. does there is anyway to know if z-axis is positive up or down 
??  
           ..like return ?? 

With Regards 

Jaison




On Fri, 2 Apr 2004, Ansley Manke wrote:

> Hi All,
> There is an updated version of fill_between.jnl which works correctly when
> there is a depth axis.  It's available linked to the FAQ which describes 
> the
> technique, and it will be part of the next Ferret release:
> 
> http://www.ferret.noaa.gov/Ferret/FAQ/custom_plots/fill_between.html
> 
> Ansley Manke
> 
> Patrick Brockmann wrote:
> 
> > Hi all,
> >
> > I have noticed that the fill_between script does not run properly (no 
> > action)
> > when I use a vertical axis indicated as depth.
> >
> > Could it be corrected if feasible ?
> >
> > ***********************************************************************
> > See the following script:
> >
> > yes? def axis/z=1:100:1/depth myzaxis
> > yes? let a=sin(z[gz=myzaxis]/10)
> > yes? plot a
> > yes? go fill_between poly/over/palette=red/nolab a myzaxis -2
> >
> > See 
> > http://dods.ipsl.jussieu.fr/brocksce/ferret_bugs/err553_fillbetween.jnl 
> > <http://dods.ipsl.jussieu.fr/brocksce/ferret_bugs/err553_fillbetween.jnl>
> >
> > ***********************************************************************
> >
> > Thanks
> > Patrick
> >
>