void scatter_charts()
//===================
// Display two scatter charts beside each other;
// one using default options, the other customized
{
chartenv env;
// use left half of screen
_pg_defaultchart( &env, _PG_SCATTERCHART, _PG_POINTANDLINE );
strcpy( env.maintitle.title, "Scatter Chart" );
env.chartwindow.x1 = 0;
env.chartwindow.y1 = 0;
env.chartwindow.x2 = xmid - 1;
env.chartwindow.y2 = ymax - 1;
_pg_chartscatterms( &env, x, y, NUM_SERIES,
NUM_VALUES, NUM_VALUES, labels );
// use right half of screen
_pg_defaultchart( &env, _PG_SCATTERCHART, _PG_POINTANDLINE );
strcpy( env.maintitle.title, "Scatter Chart" );
strcpy( env.subtitle.title, "(1991 Production)" );
env.chartwindow.x1 = xmid;
env.chartwindow.y1 = 0;
env.chartwindow.x2 = xmax - 1;
env.chartwindow.y2 = ymax - 1;
env.chartwindow.background = 2;
env.datawindow.background = 8;
env.legend.legendwindow.background = 8;
env.legend.place = _PG_BOTTOM;
env.maintitle.justify = _PG_LEFT;
_pg_analyzescatterms( &env, x, y, NUM_SERIES,
NUM_VALUES, NUM_VALUES, labels );
env.yaxis.autoscale = 0;
env.yaxis.scalemin = 0.0;
env.yaxis.scalemax = 60.0;
env.yaxis.ticinterval = 20.0;
env.yaxis.grid = 1;
env.yaxis.gridstyle = 2;
_pg_chartscatterms( &env, x, y, NUM_SERIES,
NUM_VALUES, NUM_VALUES, labels );
}
main()
{
chartenv env;
_setvideomode( _VRES16COLOR );
_pg_initchart();
_pg_defaultchart( &env,
_PG_SCATTERCHART, _PG_POINTANDLINE );
strcpy( env.maintitle.title, "Scatter Chart" );
_pg_analyzescatterms( &env, x, y, NUM_SERIES,
NUM_VALUES, NUM_VALUES, labels );
/* display x-axis labels with 2 decimal places */
env.xaxis.autoscale = 0;
env.xaxis.ticdecimals = 2;
_pg_chartscatterms( &env, x, y, NUM_SERIES,
NUM_VALUES, NUM_VALUES, labels );
getch();
_setvideomode( _DEFAULTMODE );
}
