On 23/02/2017 18:32, Alan W. Irwin wrote: > On 2017-02-23 12:24-0000 Peter Williams wrote: > >> I need to label my contours with floating point values. However, I seem >> to get strange results. >> I have a simplified example of what occurs in the program below. It >> draws an ellipse with contour value 1.0e10, i.e. x*x/4 + y*y = 1.0e10. >> The contour is good. The label is written as 1.0?#???10 where ? stands >> for a character I cannot recognise in this context. What am I doing >> wrong? > > Hi Peter: > > As a general rule (for everybody here), check with the examples first > to see what they do since > those examples are tested thoroughly before each release. > > In this case examples/c/x09.c is an example of contour labels which do > work, but I notice the data values do not have the huge scale that > yours do (so our testing never tests the exponential option that is > documented in > <http://plplot.sourceforge.net/docbook-manual/plplot-html-5.12.0/pl_setcontlabelformat.html>). > > > > As a first step, could you let us know your exact platform and also > build example 9 for yourself to confirm it works fine on that > platform? > > Assuming that does work, then as a second step to make sure all other > aspects of your own simplified testing example are working properly > what happens if you scale your example, (e.g., set the above 1.0e10 > value to something like 1.0) to a non-exponential range, and use > pl_setcontlabelformat( 4, 3 ); like example 9 does? If that also > works (as it should if example 9 works for you), then I would scale > your example to both single-digit positive and negative exponents, and > also explore what happens if you change the parameters of > pl_setcontlabelformat. That is, explore the problem a little to give > us an idea of the conditions (compared to the scale of our example 9) > where you are getting bad labels.
Hello Alan I did some testing last night: for each choice of format parameters for (a) fixed point the Postscript output file was correct ; for (b) floating point output the Postscript output was wrong. Has anybody tested my example program for Postscript output files for the data shown? It would be helpful. This morning I tried output to the wingcc device. The output for floating point was correct. This suggests that the contouring routines are Ok and the problem is writing the Postscript file. There is still a problem, at least for me! I import Postscript files into .tex documents. I use Plplot.5-12.0 (the most recent version?) . Built with Cmake3.7.2 and MinGW5.3.0 on Windows 7 Pro 64bit. Any ideas? Best Wishes, Peter Williams ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
