void
chart_datum(struct chart *ch, int dataset UNUSED, double x, double y)
{
void
chart_datum(struct chart *ch, int dataset UNUSED, double x, double y)
{
pl_fmarker_r(ch->lp, x_pos, y_pos, 6, 15);
pl_fmarker_r(ch->lp, x_pos, y_pos, 6, 15);
-chart_line(struct chart *ch, double slope, double intercept,
+chart_line(struct chart *ch, double slope, double intercept,
x1 = (x1 - ch->x_min) * ch->abscissa_scale + ch->data_left ;
x2 = (x2 - ch->x_min) * ch->abscissa_scale + ch->data_left ;
x1 = (x1 - ch->x_min) * ch->abscissa_scale + ch->data_left ;
x2 = (x2 - ch->x_min) * ch->abscissa_scale + ch->data_left ;
pl_fline_r(ch->lp, x1, y1, x2, y2);
pl_fline_r(ch->lp, x1, y1, x2, y2);