[Gnuplot-info] R/H axis suddenly disappeared

[Dave H. <da...@ho...>]

Gnuplot 5.4 patchlevel 1 on MacBook Pro Sierra 10.12.6 (updated each 
week).

On 1st February (I don't know whether the date is significant) my daily 
health plot suddenly lost its R/H axis.  I didn't do nuffink...

Well, there was a MacPorts update that morning, but I didn't see Gnuplot 
in the list; I guess it's possible that something got borked, but just the 
R/H axis?  Gnuplot was last updated on 25th Jan, and worked up until now.

As it was on 31st Jan: http://www.horsfall.org/health.pdf.old (no HTTPS 
yet).

Now: http://www.horsfall.org/health.pdf

Well, all I did was to add an entry for 1st Feb:

     # Date	Time	Wgt	Gth	Sys	Dia	HR

     30/1/21	1800	89.9	109	115	72	77
     31/1/21	1730	88.6	109	118	72	95
==> 1/2/21	1830	88.6	109	115	67	82
     2/2/21	1730	90.3	109	118	60	69

The error:

     gnuplot> load 'health.gp'
 	     "health.gp" line 99: warning: y2 axis range undefined or overflow

Note that line 99 is actually the last continued line of the "plot" 
command, which I certainly had not changed:

     mackie:health dave$ ls -l *.gp
     -rw-r--r--  1 dave  staff  5511 Sep 27  2019 health.gp

(Note that the one I attached has potentially sensitive comments removed; 
it's my personal information, after all, but I'm willing to share the lot 
with an individual, not the entire list.)

It's worth noting that the plot has probably saved my life a few times, as 
I suffer from hypertension (with medication)...

The script itself is attached (I trust that it's within the guidelines).

Thanks.

-- Dave