[Plplot-general] How do I rotate tick labels for an axis using plplot?

[Jamil E. <unc...@gm...>]

Hi,

I am using [PLplot][1] in C to generate some simple 2-d plots of time
series data and the labels for my x-axis in the resulting plot are
currently horizontal.  Does anyone know how to rotate the tick labels
by 45 deg?  To make it clear what I mean by rotation of tick labels,
[here][2] is an example of rotation of tick labels by 90 degrees in a
plot created using Python/MatPlotlib.

Looking through the PLPlot [documentation][3] I found reference to
[plslabelfunc][4] but I'm not sure how to use this to achieve my goal.

Best would be if someone could show how to modify this simple example
taken from the PLplot [examples][5]:

    #include "plcdemos.h"
    #define NSIZE    101

    int
    main( int argc, const char *argv[] )
    {
      PLFLT x[NSIZE], y[NSIZE];
      PLFLT xmin = 0., xmax = 1., ymin = 0., ymax = 100.;
      int   i;

      // Prepare data to be plotted.
      for ( i = 0; i < NSIZE; i++ )
      {
          x[i] = (PLFLT) ( i ) / (PLFLT) ( NSIZE - 1 );
          y[i] = ymax * x[i] * x[i];
      }

      // Parse and process command line arguments
      plparseopts( &argc, argv, PL_PARSE_FULL );

      // Initialize plplot
      plinit();

      // Create a labelled box to hold the plot.
      plenv( xmin, xmax, ymin, ymax, 0, 0 );
      pllab( "x", "y=100 x#u2#d", "Simple PLplot demo of a 2D line plot" );

      // Plot the data that was prepared above.
      plline( NSIZE, x, y );

      // Close PLplot library
      plend();

      exit( 0 );
    }

Any help would be most appreciated.  I should also mention I posted
this question on stackoverflow at
http://stackoverflow.com/questions/26189242/how-do-i-rotate-tick-labels-for-an-axis-using-plplot.

  [1]: http://plplot.sourceforge.net/index.php
  [2]: http://matplotlib.org/examples/ticks_and_spines/ticklabels_demo_rotation.html
  [3]: http://plplot.sourceforge.net/documentation.php
  [4]: http://plplot.sourceforge.net/docbook-manual/plplot-html-5.10.0/plslabelfunc.html
  [5]: http://plplot.sourceforge.net/examples.php