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func DataTableToPng ¶

func DataTableToPng(b *bytes.Buffer, dt *db.DataTable, title string, width, height float64, xLabel string) error

func SetFontDir ¶

func SetFontDir(fontDir string)

func TimeTicks ¶

func TimeTicks(min, max float64) (ticks []plot.Tick)

DefaultTicks is suitable for the Tick.Marker field of an Axis, it returns a resonable default set of tick marks.