On 2013-05-27 12:55-0000 Schwartz, Steven J wrote:
> Dear plplot-devel,
> I attach a patch to fix the mis-alignment of the major axes and grid
in the case of a time-axis ('d' option). This was due to different
algorithms being applied to determine the grid and tick location. In
essence, the grid didn't subtract off the start time.
> While fixing this, I also found a small bug in the tick routine for
the left y-axis again in the case of time ('d') option. This was due
to a vpwymi instead of vpwyma at this location. For reasons best known
to you, the tick routines work down the left axis and up the right
axis, so the two bits of code are different.
> I attach some code to test this, plus the before and after outputs.
> Steve
> PS I submitted a separate patch, also to plbox, last week. If it
would be helpful, I can generate a patch that combines both sets of
fixes. Both are patched against svn 12298.
> PPS in case someone is confused. My test rig plots y-axes as both a
float representation of the time (which starts at zero and runs
several days) and the plplot time (which starts at t=0 seconds,
corresponding to day 001 of the year). So the two plots don't appear
to have the same y-limits but are correct.
> PPPS I looked at the minor tick grid option ('h'), which works ok
but is absent in all cases unless the major grid is also requested. I
guess this is probably as intended, but does limit the ability to use
different line styles, thicknesses, and/or colours for the major and
minor grid.
Hi Steve:
I am up to my eyes in something else (The "Build Projects" project) so
I don't have time to look at your patches for probably several weeks.
Since nobody else has responded they are probably in the same
situation (one of the perils of an all-volunteer project). However,
from your explanation of your first patch, it appears you are fixing
an area of PLplot (label exponents) that I have long thought was
problematic. In fact, the situation has been so bad I have always
gone out of my way to use scaled or logarithmic variables to avoid
exponent labels as much as possible. So your first patch and also your
second patch to fix a misalignment issue sound useful. So ping us
again in a couple of weeks if nobody has evaluated your patches by
then.
Alan
__________________________
Alan W. Irwin
Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).
Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered Science
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