// Thumbnail the thumbnail for the Scatter,
// implementing the plot.Thumbnailer interface.
func (pts *Scatter) Thumbnail(c *draw.Canvas) {
c.DrawGlyph(pts.GlyphStyle, c.Center())
}
// Plot draws the Scatter, implementing the plot.Plotter
// interface.
func (pts *Scatter) Plot(c draw.Canvas, plt *plot.Plot) {
trX, trY := plt.Transforms(&c)
for _, p := range pts.XYs {
c.DrawGlyph(pts.GlyphStyle, draw.Point{trX(p.X), trY(p.Y)})
}
}