
Summary: This example shows how to create parallel coordinates plot in F#.
Let's first create some data for the purpose of creating example charts:
open Plotly.NET
let data =
[ "A", [ 1.; 4.; 3.4; 0.7 ]
"B", [ 3.; 1.5; 1.7; 2.3 ]
"C", [ 2.; 4.; 3.1; 5. ]
"D", [ 4.; 2.; 2.; 4. ] ]
Parallel coordinates are a common way of visualizing high-dimensional geometry and analyzing multivariate data.
To show a set of points in an n-dimensional space, a backdrop is drawn consisting of n parallel lines, typically
vertical and equally spaced. A point in n-dimensional space is represented as a polyline with vertices on the parallel axes;
the position of the vertex on the i-th axis corresponds to the i-th coordinate of the point.
let parcoords1 =
Chart.ParallelCoord(keyValues = data, LineColor = Color.fromString "blue")
This example shows the usage of some of the styling options using Chart.ParallelCoord
.
For even more styling control, use the respective TraceStyle function TraceDomainStyle.ParallelCoord
open Plotly.NET.TraceObjects
open Deedle
let parcoordsStyled =
let data =
__SOURCE_DIRECTORY__ + "/../data/iris_cat.csv"
|> Frame.ReadCsv
let dims =
[ Dimension.initParallel (
Label = "sepal_length",
Values = (data |> Frame.getCol "sepal_length" |> Series.values),
Range = StyleParam.Range.MinMax(0., 8.)
)
Dimension.initParallel (
Label = "sepal_width",
Values = (data |> Frame.getCol "sepal_width" |> Series.values),
Range = StyleParam.Range.MinMax(0., 8.)
)
Dimension.initParallel (
Label = "petal_length",
Values = (data |> Frame.getCol "petal_length" |> Series.values),
Range = StyleParam.Range.MinMax(0., 8.)
)
Dimension.initParallel (
Label = "petal_width",
Values = (data |> Frame.getCol "petal_width" |> Series.values),
Range = StyleParam.Range.MinMax(0., 8.)
) ]
let colors =
data |> Frame.getCol "species_id" |> Series.values |> Color.fromColorScaleValues
Chart.ParallelCoord(dimensions = dims, LineColorScale = StyleParam.Colorscale.Viridis, LineColor = colors)
namespace Plotly
namespace Plotly.NET
module Defaults
from Plotly.NET
<summary>
Contains mutable global default values.
Changing these values will apply the default values to all consecutive Chart generations.
</summary>
val mutable DefaultDisplayOptions: DisplayOptions
Multiple items
type DisplayOptions =
inherit DynamicObj
new: unit -> DisplayOptions
static member addAdditionalHeadTags: additionalHeadTags: XmlNode list -> (DisplayOptions -> DisplayOptions)
static member addDescription: description: XmlNode list -> (DisplayOptions -> DisplayOptions)
static member combine: first: DisplayOptions -> second: DisplayOptions -> DisplayOptions
static member getAdditionalHeadTags: displayOpts: DisplayOptions -> XmlNode list
static member getDescription: displayOpts: DisplayOptions -> XmlNode list
static member getPlotlyReference: displayOpts: DisplayOptions -> PlotlyJSReference
static member init: ?AdditionalHeadTags: XmlNode list * ?Description: XmlNode list * ?PlotlyJSReference: PlotlyJSReference -> DisplayOptions
static member initCDNOnly: unit -> DisplayOptions
...
--------------------
new: unit -> DisplayOptions
static member DisplayOptions.init: ?AdditionalHeadTags: Giraffe.ViewEngine.HtmlElements.XmlNode list * ?Description: Giraffe.ViewEngine.HtmlElements.XmlNode list * ?PlotlyJSReference: PlotlyJSReference -> DisplayOptions
type PlotlyJSReference =
| CDN of string
| Full
| Require of string
| NoReference
<summary>
Sets how plotly is referenced in the head of html docs.
</summary>
union case PlotlyJSReference.NoReference: PlotlyJSReference
val data: (string * float list) list
val parcoords1: GenericChart.GenericChart
type Chart =
static member AnnotatedHeatmap: zData: seq<#seq<'a1>> * annotationText: seq<#seq<string>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?X: seq<'a3> * ?MultiX: seq<seq<'a3>> * ?XGap: int * ?Y: seq<'a4> * ?MultiY: seq<seq<'a4>> * ?YGap: int * ?Text: 'a5 * ?MultiText: seq<'a5> * ?ColorBar: ColorBar * ?ColorScale: Colorscale * ?ShowScale: bool * ?ReverseScale: bool * ?ZSmooth: SmoothAlg * ?Transpose: bool * ?UseWebGL: bool * ?ReverseYAxis: bool * ?UseDefaults: bool -> GenericChart (requires 'a1 :> IConvertible and 'a3 :> IConvertible and 'a4 :> IConvertible and 'a5 :> IConvertible) + 1 overload
static member Area: x: seq<#IConvertible> * y: seq<#IConvertible> * ?ShowMarkers: bool * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?MultiOpacity: seq<float> * ?Text: 'a2 * ?MultiText: seq<'a2> * ?TextPosition: TextPosition * ?MultiTextPosition: seq<TextPosition> * ?MarkerColor: Color * ?MarkerColorScale: Colorscale * ?MarkerOutline: Line * ?MarkerSymbol: MarkerSymbol * ?MultiMarkerSymbol: seq<MarkerSymbol> * ?Marker: Marker * ?LineColor: Color * ?LineColorScale: Colorscale * ?LineWidth: float * ?LineDash: DrawingStyle * ?Line: Line * ?AlignmentGroup: string * ?OffsetGroup: string * ?StackGroup: string * ?Orientation: Orientation * ?GroupNorm: GroupNorm * ?FillColor: Color * ?FillPatternShape: PatternShape * ?FillPattern: Pattern * ?UseWebGL: bool * ?UseDefaults: bool -> GenericChart (requires 'a2 :> IConvertible) + 1 overload
static member Bar: values: seq<#IConvertible> * ?Keys: seq<'a1> * ?MultiKeys: seq<seq<'a1>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?MultiOpacity: seq<float> * ?Text: 'a2 * ?MultiText: seq<'a2> * ?MarkerColor: Color * ?MarkerColorScale: Colorscale * ?MarkerOutline: Line * ?MarkerPatternShape: PatternShape * ?MultiMarkerPatternShape: seq<PatternShape> * ?MarkerPattern: Pattern * ?Marker: Marker * ?Base: #IConvertible * ?Width: 'a4 * ?MultiWidth: seq<'a4> * ?TextPosition: TextPosition * ?MultiTextPosition: seq<TextPosition> * ?UseDefaults: bool -> GenericChart (requires 'a1 :> IConvertible and 'a2 :> IConvertible and 'a4 :> IConvertible) + 1 overload
static member BoxPlot: ?X: seq<'a0> * ?MultiX: seq<seq<'a0>> * ?Y: seq<'a1> * ?MultiY: seq<seq<'a1>> * ?Name: string * ?ShowLegend: bool * ?Text: 'a2 * ?MultiText: seq<'a2> * ?FillColor: Color * ?MarkerColor: Color * ?Marker: Marker * ?Opacity: float * ?WhiskerWidth: float * ?BoxPoints: BoxPoints * ?BoxMean: BoxMean * ?Jitter: float * ?PointPos: float * ?Orientation: Orientation * ?OutlineColor: Color * ?OutlineWidth: float * ?Outline: Line * ?AlignmentGroup: string * ?OffsetGroup: string * ?Notched: bool * ?NotchWidth: float * ?QuartileMethod: QuartileMethod * ?UseDefaults: bool -> GenericChart (requires 'a0 :> IConvertible and 'a1 :> IConvertible and 'a2 :> IConvertible) + 2 overloads
static member Bubble: x: seq<#IConvertible> * y: seq<#IConvertible> * sizes: seq<int> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?MultiOpacity: seq<float> * ?Text: 'a2 * ?MultiText: seq<'a2> * ?TextPosition: TextPosition * ?MultiTextPosition: seq<TextPosition> * ?MarkerColor: Color * ?MarkerColorScale: Colorscale * ?MarkerOutline: Line * ?MarkerSymbol: MarkerSymbol * ?MultiMarkerSymbol: seq<MarkerSymbol> * ?Marker: Marker * ?LineColor: Color * ?LineColorScale: Colorscale * ?LineWidth: float * ?LineDash: DrawingStyle * ?Line: Line * ?AlignmentGroup: string * ?OffsetGroup: string * ?StackGroup: string * ?Orientation: Orientation * ?GroupNorm: GroupNorm * ?UseWebGL: bool * ?UseDefaults: bool -> GenericChart (requires 'a2 :> IConvertible) + 1 overload
static member Candlestick: ``open`` : seq<#IConvertible> * high: seq<#IConvertible> * low: seq<#IConvertible> * close: seq<#IConvertible> * ?X: seq<'a4> * ?MultiX: seq<seq<'a4>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?Text: 'a5 * ?MultiText: seq<'a5> * ?Line: Line * ?IncreasingColor: Color * ?Increasing: FinanceMarker * ?DecreasingColor: Color * ?Decreasing: FinanceMarker * ?WhiskerWidth: float * ?ShowXAxisRangeSlider: bool * ?UseDefaults: bool -> GenericChart (requires 'a4 :> IConvertible and 'a5 :> IConvertible) + 2 overloads
static member Column: values: seq<#IConvertible> * ?Keys: seq<'a1> * ?MultiKeys: seq<seq<'a1>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?MultiOpacity: seq<float> * ?Text: 'a2 * ?MultiText: seq<'a2> * ?MarkerColor: Color * ?MarkerColorScale: Colorscale * ?MarkerOutline: Line * ?MarkerPatternShape: PatternShape * ?MultiMarkerPatternShape: seq<PatternShape> * ?MarkerPattern: Pattern * ?Marker: Marker * ?Base: #IConvertible * ?Width: 'a4 * ?MultiWidth: seq<'a4> * ?TextPosition: TextPosition * ?MultiTextPosition: seq<TextPosition> * ?UseDefaults: bool -> GenericChart (requires 'a1 :> IConvertible and 'a2 :> IConvertible and 'a4 :> IConvertible) + 1 overload
static member Contour: zData: seq<#seq<'a1>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?X: seq<'a2> * ?MultiX: seq<seq<'a2>> * ?Y: seq<'a3> * ?MultiY: seq<seq<'a3>> * ?Text: 'a4 * ?MultiText: seq<'a4> * ?ColorBar: ColorBar * ?ColorScale: Colorscale * ?ShowScale: bool * ?ReverseScale: bool * ?Transpose: bool * ?ContourLineColor: Color * ?ContourLineDash: DrawingStyle * ?ContourLineSmoothing: float * ?ContourLine: Line * ?ContoursColoring: ContourColoring * ?ContoursOperation: ConstraintOperation * ?ContoursType: ContourType * ?ShowContourLabels: bool * ?ContourLabelFont: Font * ?Contours: Contours * ?FillColor: Color * ?NContours: int * ?UseDefaults: bool -> GenericChart (requires 'a1 :> IConvertible and 'a2 :> IConvertible and 'a3 :> IConvertible and 'a4 :> IConvertible)
static member Funnel: x: seq<#IConvertible> * y: seq<#IConvertible> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?Width: float * ?Offset: float * ?Text: 'a2 * ?MultiText: seq<'a2> * ?TextPosition: TextPosition * ?MultiTextPosition: seq<TextPosition> * ?Orientation: Orientation * ?AlignmentGroup: string * ?OffsetGroup: string * ?MarkerColor: Color * ?MarkerOutline: Line * ?Marker: Marker * ?TextInfo: TextInfo * ?ConnectorLineColor: Color * ?ConnectorLineStyle: DrawingStyle * ?ConnectorFillColor: Color * ?ConnectorLine: Line * ?Connector: FunnelConnector * ?InsideTextFont: Font * ?OutsideTextFont: Font * ?UseDefaults: bool -> GenericChart (requires 'a2 :> IConvertible)
static member Heatmap: zData: seq<#seq<'a1>> * ?X: seq<'a2> * ?MultiX: seq<seq<'a2>> * ?Y: seq<'a3> * ?MultiY: seq<seq<'a3>> * ?Name: string * ?ShowLegend: bool * ?Opacity: float * ?XGap: int * ?YGap: int * ?Text: 'a4 * ?MultiText: seq<'a4> * ?ColorBar: ColorBar * ?ColorScale: Colorscale * ?ShowScale: bool * ?ReverseScale: bool * ?ZSmooth: SmoothAlg * ?Transpose: bool * ?UseWebGL: bool * ?ReverseYAxis: bool * ?UseDefaults: bool -> GenericChart (requires 'a1 :> IConvertible and 'a2 :> IConvertible and 'a3 :> IConvertible and 'a4 :> IConvertible) + 1 overload
...
static member Chart.ParallelCoord: keyValues: seq<string * #seq<'b>> * ?Name: string * ?LineColor: Color * ?LineColorScale: StyleParam.Colorscale * ?ShowLineColorScale: bool * ?ReverseLineColorScale: bool * ?Line: Line * ?LabelAngle: int * ?LabelFont: Font * ?LabelSide: StyleParam.Side * ?RangeFont: Font * ?TickFont: Font * ?UseDefaults: bool -> GenericChart.GenericChart (requires 'b :> System.IConvertible)
static member Chart.ParallelCoord: dimensions: seq<TraceObjects.Dimension> * ?Name: string * ?LineColor: Color * ?LineColorScale: StyleParam.Colorscale * ?ShowLineColorScale: bool * ?ReverseLineColorScale: bool * ?Line: Line * ?LabelAngle: int * ?LabelFont: Font * ?LabelSide: StyleParam.Side * ?RangeFont: Font * ?TickFont: Font * ?UseDefaults: bool -> GenericChart.GenericChart
type Color =
override Equals: other: obj -> bool
override GetHashCode: unit -> int
static member fromARGB: a: int -> r: int -> g: int -> b: int -> Color
static member fromColorScaleValues: c: seq<#IConvertible> -> Color
static member fromColors: c: seq<Color> -> Color
static member fromHex: s: string -> Color
static member fromKeyword: c: ColorKeyword -> Color
static member fromRGB: r: int -> g: int -> b: int -> Color
static member fromString: c: string -> Color
member Value: obj
<summary>
Plotly color can be a single color, a sequence of colors, or a sequence of numeric values referencing the color of the colorscale obj
</summary>
static member Color.fromString: c: string -> Color
module GenericChart
from Plotly.NET
<summary>
Module to represent a GenericChart
</summary>
val toChartHTML: gChart: GenericChart.GenericChart -> string
namespace Plotly.NET.TraceObjects
namespace Deedle
val parcoordsStyled: GenericChart.GenericChart
val data: Frame<int,string>
Multiple items
module Frame
from Deedle
--------------------
type Frame =
static member ReadCsv: location: string * hasHeaders: Nullable<bool> * inferTypes: Nullable<bool> * inferRows: Nullable<int> * schema: string * separators: string * culture: string * maxRows: Nullable<int> * missingValues: string[] * preferOptions: bool -> Frame<int,string> + 1 overload
static member ReadReader: reader: IDataReader -> Frame<int,string>
static member CustomExpanders: Dictionary<Type,Func<obj,seq<string * Type * obj>>>
static member NonExpandableInterfaces: ResizeArray<Type>
static member NonExpandableTypes: HashSet<Type>
--------------------
type Frame<'TRowKey,'TColumnKey (requires equality and equality)> =
interface IDynamicMetaObjectProvider
interface INotifyCollectionChanged
interface IFrameFormattable
interface IFsiFormattable
interface IFrame
new: rowIndex: IIndex<'TRowKey> * columnIndex: IIndex<'TColumnKey> * data: IVector<IVector> * indexBuilder: IIndexBuilder * vectorBuilder: IVectorBuilder -> Frame<'TRowKey,'TColumnKey> + 1 overload
member AddColumn: column: 'TColumnKey * series: seq<'V> -> unit + 3 overloads
member AggregateRowsBy: groupBy: seq<'TColumnKey> * aggBy: seq<'TColumnKey> * aggFunc: Func<Series<'TRowKey,'a>,'b> -> Frame<int,'TColumnKey>
member Clone: unit -> Frame<'TRowKey,'TColumnKey>
member ColumnApply: f: Func<Series<'TRowKey,'T>,ISeries<'TRowKey>> -> Frame<'TRowKey,'TColumnKey> + 1 overload
...
--------------------
new: names: seq<'TColumnKey> * columns: seq<ISeries<'TRowKey>> -> Frame<'TRowKey,'TColumnKey>
new: rowIndex: Indices.IIndex<'TRowKey> * columnIndex: Indices.IIndex<'TColumnKey> * data: IVector<IVector> * indexBuilder: Indices.IIndexBuilder * vectorBuilder: Vectors.IVectorBuilder -> Frame<'TRowKey,'TColumnKey>
static member Frame.ReadCsv: path: string * ?hasHeaders: bool * ?inferTypes: bool * ?inferRows: int * ?schema: string * ?separators: string * ?culture: string * ?maxRows: int * ?missingValues: string[] * ?preferOptions: bool -> Frame<int,string>
static member Frame.ReadCsv: stream: System.IO.Stream * ?hasHeaders: bool * ?inferTypes: bool * ?inferRows: int * ?schema: string * ?separators: string * ?culture: string * ?maxRows: int * ?missingValues: string[] * ?preferOptions: bool -> Frame<int,string>
static member Frame.ReadCsv: reader: System.IO.TextReader * ?hasHeaders: bool * ?inferTypes: bool * ?inferRows: int * ?schema: string * ?separators: string * ?culture: string * ?maxRows: int * ?missingValues: string[] * ?preferOptions: bool -> Frame<int,string>
static member Frame.ReadCsv: stream: System.IO.Stream * hasHeaders: System.Nullable<bool> * inferTypes: System.Nullable<bool> * inferRows: System.Nullable<int> * schema: string * separators: string * culture: string * maxRows: System.Nullable<int> * missingValues: string[] * preferOptions: System.Nullable<bool> -> Frame<int,string>
static member Frame.ReadCsv: location: string * hasHeaders: System.Nullable<bool> * inferTypes: System.Nullable<bool> * inferRows: System.Nullable<int> * schema: string * separators: string * culture: string * maxRows: System.Nullable<int> * missingValues: string[] * preferOptions: bool -> Frame<int,string>
static member Frame.ReadCsv: path: string * indexCol: string * ?hasHeaders: bool * ?inferTypes: bool * ?inferRows: int * ?schema: string * ?separators: string * ?culture: string * ?maxRows: int * ?missingValues: string[] * ?preferOptions: bool -> Frame<'R,string> (requires equality)
val dims: Dimension list
Multiple items
type Dimension =
inherit DynamicObj
new: unit -> Dimension
static member initParallel: ?ConstraintRange: Range * ?Label: #IConvertible * ?MultiSelect: bool * ?Name: string * ?Range: Range * ?TemplateItemName: string * ?TickFormat: TickMode * ?TickText: seq<#IConvertible> * ?Tickvals: seq<#IConvertible> * ?Values: seq<#IConvertible> * ?Visible: bool -> Dimension
static member initSplom: ?AxisMatches: bool * ?AxisType: AxisType * ?Label: #IConvertible * ?Name: string * ?TemplateItemName: string * ?Values: seq<#IConvertible> * ?Visible: bool -> Dimension
static member style: ?Label: #IConvertible * ?Name: string * ?TemplateItemName: string * ?Values: seq<#IConvertible> * ?Visible: bool * ?ConstraintRange: Range * ?MultiSelect: bool * ?Range: Range * ?TickFormat: TickMode * ?TickText: seq<#IConvertible> * ?Tickvals: seq<#IConvertible> * ?AxisMatches: bool * ?AxisType: AxisType -> (Dimension -> Dimension)
<summary>
Dimensions type inherits from dynamic object
</summary>
--------------------
new: unit -> Dimension
static member Dimension.initParallel: ?ConstraintRange: StyleParam.Range * ?Label: #System.IConvertible * ?MultiSelect: bool * ?Name: string * ?Range: StyleParam.Range * ?TemplateItemName: string * ?TickFormat: StyleParam.TickMode * ?TickText: seq<#System.IConvertible> * ?Tickvals: seq<#System.IConvertible> * ?Values: seq<#System.IConvertible> * ?Visible: bool -> Dimension
val getCol: column: 'C -> frame: Frame<'R,'C> -> Series<'R,'V> (requires equality and equality)
Multiple items
module Series
from Deedle
--------------------
type Series =
static member ofNullables: values: seq<Nullable<'a0>> -> Series<int,'a0> (requires default constructor and value type and 'a0 :> ValueType)
static member ofObservations: observations: seq<'c * 'd> -> Series<'c,'d> (requires equality)
static member ofOptionalObservations: observations: seq<'K * 'a1 option> -> Series<'K,'a1> (requires equality)
static member ofValues: values: seq<'a> -> Series<int,'a>
--------------------
type Series<'K,'V (requires equality)> =
interface ISeriesFormattable
interface IFsiFormattable
interface ISeries<'K>
new: index: IIndex<'K> * vector: IVector<'V> * vectorBuilder: IVectorBuilder * indexBuilder: IIndexBuilder -> Series<'K,'V> + 3 overloads
member After: lowerExclusive: 'K -> Series<'K,'V>
member Aggregate: aggregation: Aggregation<'K> * keySelector: Func<DataSegment<Series<'K,'V>>,'TNewKey> * valueSelector: Func<DataSegment<Series<'K,'V>>,OptionalValue<'R>> -> Series<'TNewKey,'R> (requires equality) + 1 overload
member AsyncMaterialize: unit -> Async<Series<'K,'V>>
member Before: upperExclusive: 'K -> Series<'K,'V>
member Between: lowerInclusive: 'K * upperInclusive: 'K -> Series<'K,'V>
member Compare: another: Series<'K,'V> -> Series<'K,Diff<'V>>
...
--------------------
new: pairs: seq<System.Collections.Generic.KeyValuePair<'K,'V>> -> Series<'K,'V>
new: keys: seq<'K> * values: seq<'V> -> Series<'K,'V>
new: keys: 'K[] * values: 'V[] -> Series<'K,'V>
new: index: Indices.IIndex<'K> * vector: IVector<'V> * vectorBuilder: Vectors.IVectorBuilder * indexBuilder: Indices.IIndexBuilder -> Series<'K,'V>
val values: series: Series<'K,'T> -> seq<'T> (requires equality)
module StyleParam
from Plotly.NET
type Range =
| MinMax of IConvertible * IConvertible
| Values of IConvertible array
member Convert: unit -> obj
static member ofMinMax: min: #IConvertible * max: #IConvertible -> Range
static member ofValues: values: seq<#IConvertible> -> Range
static member convert: (Range -> obj)
<summary>
Defines a Range between min and max value
</summary>
union case StyleParam.Range.MinMax: System.IConvertible * System.IConvertible -> StyleParam.Range
val colors: Color
static member Color.fromColorScaleValues: c: seq<#System.IConvertible> -> Color
static member Chart.ParallelCoord: keyValues: seq<string * #seq<'b>> * ?Name: string * ?LineColor: Color * ?LineColorScale: StyleParam.Colorscale * ?ShowLineColorScale: bool * ?ReverseLineColorScale: bool * ?Line: Line * ?LabelAngle: int * ?LabelFont: Font * ?LabelSide: StyleParam.Side * ?RangeFont: Font * ?TickFont: Font * ?UseDefaults: bool -> GenericChart.GenericChart (requires 'b :> System.IConvertible)
static member Chart.ParallelCoord: dimensions: seq<Dimension> * ?Name: string * ?LineColor: Color * ?LineColorScale: StyleParam.Colorscale * ?ShowLineColorScale: bool * ?ReverseLineColorScale: bool * ?Line: Line * ?LabelAngle: int * ?LabelFont: Font * ?LabelSide: StyleParam.Side * ?RangeFont: Font * ?TickFont: Font * ?UseDefaults: bool -> GenericChart.GenericChart
type Colorscale =
| Custom of seq<float * Color>
| RdBu
| Earth
| Blackbody
| YIOrRd
| YIGnBu
| Bluered
| Portland
| Electric
| Jet
...
member Convert: unit -> obj
static member convert: (Colorscale -> obj)
<summary>
The colorscale must be a collection containing a mapping of a normalized value (between 0.0 and 1.0) to it's color. At minimum, a mapping for the lowest (0.0) and highest (1.0) values are required.
</summary>
union case StyleParam.Colorscale.Viridis: StyleParam.Colorscale