Re: right_axis_plot.jnl - an alternate approach

[Mick Spillane <spillane@xxxxxxxxxxxxx>]

Hi Vincent,
In regard to your further question regarding the options available
you should consult the scripts themselves which are at
		/opt/local/ferret/ferret/go/left_axis_plot.jnl
		/opt/local/ferret/ferret/go/right_axis_plot.jnl
on my machine.  You can probably find them on your machine using
	Fgo left_axis_plot

The .jnl files in this directory are usually documented as to usage
and you can always take a copy and make minor changes to suit your
purpose.

Actually, in this case, left_axis_plot and right_axis_plot may not
be flexible enough.  Here's an alternate approach:

If you have several lines to associate with the left
and right axes it may be easier to skip left_yaxis_plot and
right_axis_plot altogether.  For example if you define two identical
viewports "under" and "over" as follows then the final plot can be
built in two parts:

	! viewport definitions
        ppl size 10 8 ; ppl axlen 8 6 ; ppl origin 1 1
	def view/size=1/orig=0,0/clip=1,1 under
	def view/size=1/orig=0,0/clip=1,1 over
        ! plot first two lines in viewport under
	region/i=1:10
	set view under
	plot/i=1:10/nolab/set i,11-i ! nolab drops sample lines
	ppl axset,,,,0 ; ppl plot ! turn off the right hand axis
	! plot second two lines in viewport over
	set view over
	plot/i=1:10/nolab/set 1/i,1/(11-i)
	ppl pen,1,3 ; ppl pen,2,4 ! use pens 3,4 for new lines
	ppl axset,0,0,0,1 ; ppl axlabp,,1 ! turn on only right axis
                                          ! and place yaxis values there
	ppl plot
	! then add a custom line key using alines or simply
  label/nouser 4 6.5 0 0 0.16 Key: Var1, @p2Var-2, @p3Var-3, @p4Var-4

Hope that works for you Vincent,
Mick

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