[Plplot-general] Possible axis drawing glitch

[Jerry]

I have encountered a repeatable problem when using my Ada binding to PLplot, and I'm wondering if it is something that I've done wrong with the binding. I've narrowed down a specific example, but the general problem is (a) the horizontal axis of 2D plots (linear or log, at least) is drawn purple, and (b) when there are more than a certain number of data points to be drawn, the purple line that overlays the horizontal axis swings up to the top of the plot and then back down to the axis. (Other glitch-types are possible, but this is typical.)

I believe I'm using 5.5.3.



Jerry

In the specific case, I am drawing a single sine wave. When the number of points is 286 or less, there is no glitch. When the number of data points is 286 or more, the glitches appear at the right-hand side of the plot, with approximately one-half "cycle" of glitches for each point over 285. I'm working with OS X and the problem appears exactly the same whether using AquaTerm, X11, Postscript color file or Postscript monochrome (but obviously without the purple color). I've attached a PDF which shows the problem when the number of points is 297. With thousands of points, the upper part of the plot is essentially obscured by purple and some errant lines go downward and some even to the edge of the drawing region, beyond the "data part" of the plot.

Plplot_odd.pdf
Description: Adobe PDF document

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