Re: overlaying with @asn on time axis

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Liz,
This is due to a quirk in Ferret's 2-dimensional plotting.  Take a look
at this FAQ, which is about exactly this question:

http://www.ferret.noaa.gov/Ferret/FAQ/custom_plots/time_series_overlay.html

Your original script works if you redefine your time axis t2 as

  define axis/t="1-mar-2001":"10-mar-2001":24/units=hours t2

Ansley Manke

Elizabeth Dobbins wrote:

Hi;

I've gotten 2 answers already!

Jean Newman suggested define 2 identical viewports and using one for the
shade plot and one for the overlay.

Mick Spillane suggested adding a T0 to the 2nd time axis:
 define axis/t="1-mar-2001":"10-mar-2001":1/t0="28-feb-2001"/units=days t2
Then it works fine in the example, but still not quite in my more
complicated problem.  Still I think he's right when he suggested that the
overlay is simply offscale somewhere, so I'm going to follow up on that
idea.

Liz

On Thu, 14 Oct 2004, Elizabeth Dobbins wrote:

  

Hi;

I'm trying to overlay a line plot of surface mixed layer depth over a
shade plot of mixing coefficient.  It works OK if I have a simple time
axis, but if I try to regrid to a calendar time axis, the overlay doesn't
work.

Here's a simple example that recreates the problem:

! define the axes
def axis/t=1:10:1 t1
define axis/t="1-mar-2001":"10-mar-2001":1/units=days t2
define axis/z=1:100:1 z1

! create a couple variables to plot
let varz= 0*t[gt=t1]+z[gz=z1]
let dep = {10,20,30,40,50,60,70,80,90,100}

! This one works
shade varz
plot/over dep[gt=t1@asn]

! This one doesn't
shade varz[gt=t2@asn]
plot/over dep[gt=t2@asn]


I've tried all sorts of things to fix dep, like specifying the l range and
defining an intermediate variable, but nothing I've tried works.  Maybe
someone else can find a way?

 Liz

*********************
Elizabeth L. Dobbins
Research Scientist
JISAO/PMEL
phone: (206) 526-4581

"Various forms of jiggery-pokery were used to suit
horses to courses."  -- Michael Burleigh

    

*********************
Elizabeth L. Dobbins
Research Scientist
JISAO/PMEL
phone: (206) 526-4581

"Various forms of jiggery-pokery were used to suit
horses to courses."  -- Michael Burleigh