heatmap

type Heatmap struct {
	AbundanceCap float64
	Annotations  types.Annotations
	CellSize     int
	Columns      []string
	FillColor    string
	FontSize     int
	Invert       bool
	LeftMargin   int
	Markers      types.Markers
	Matrix       [][]float64
	MinAbundance float64
	NumColors    int
	PlotHeight   int
	PlotWidth    int
	Rows         []string
	SvgHeight    int
	SvgWidth     int
	TopMargin    int
	XLabel       string
	YLabel       string
}

type Legend struct {
	Filename  string
	NumColors int
	Settings  types.Settings
	Title     string
}