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02_7_heatmaps.fsx
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02_7_heatmaps.fsx
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(**
---
title: Heatmaps
category: Simple Charts
categoryindex: 3
index: 8
---
*)
(*** hide ***)
(*** condition: prepare ***)
#r "nuget: Newtonsoft.JSON, 13.0.1"
#r "nuget: DynamicObj, 1.0.1"
#r "../bin/Plotly.NET/netstandard2.0/Plotly.NET.dll"
(*** condition: ipynb ***)
#if IPYNB
#r "nuget: Plotly.NET, {{fsdocs-package-version}}"
#r "nuget: Plotly.NET.Interactive, {{fsdocs-package-version}}"
#endif // IPYNB
(**
# Heatmaps
[](https://mybinder.org/v2/gh/plotly/Plotly.NET/gh-pages?filepath={{fsdocs-source-basename}}.ipynb) 
[]({{root}}{{fsdocs-source-basename}}.fsx) 
[]({{root}}{{fsdocs-source-basename}}.ipynb)
*Summary:* This example shows how to create heatmap charts in F#.
let's first create some data for the purpose of creating example charts:
*)
open Plotly.NET
let matrix =
[[1.;1.5;0.7;2.7];
[2.;0.5;1.2;1.4];
[0.1;2.6;2.4;3.0];]
let rownames = ["p3";"p2";"p1"]
let colnames = ["Tp0";"Tp30";"Tp60";"Tp160"]
(**
A heatmap chart can be created using the `Chart.Heatmap` functions.
When creating heatmap charts, it is usually desirable to provide the values in matrix form, rownames and colnames.
A heatmap needs at least 2 dimensional data that represents the z dimension. the X and Y dimension sizes can be inferred from the z data:
*)
// Generating the Heatmap with only z Data
let heat1 =
Chart.Heatmap(
matrix
)
(*** condition: ipynb ***)
#if IPYNB
heat1
#endif // IPYNB
(***hide***)
heat1 |> GenericChart.toChartHTML
(***include-it-raw***)
(**
## Inverting the Y Axis
Per default, the y axis starts at the origin of the X/Y plane.
If it is however desired to represent a 2D matrix exactly how it is notated, invert the YAxis by setting `ReverseYAxis`.
*)
// Addning row/column names and inverting the Y axis:
let heat2 =
Chart.Heatmap(
matrix,
colnames,
rownames,
ReverseYAxis = true
)
(*** condition: ipynb ***)
#if IPYNB
heat2
#endif // IPYNB
(***hide***)
heat2 |> GenericChart.toChartHTML
(***include-it-raw***)
(**
## Styling Colorbars and using custom color scales
The colorscale can be set via the `ColorScale` argument.
All charts that contain colorbars can be styled by the `Chart.withColorBarStyle` function.
Here is an example that adds a title to the colorbar:
*)
let heat3 =
Chart.Heatmap(
matrix,
ColorScale = StyleParam.Colorscale.Viridis
)
|> Chart.withColorBarStyle(TitleText = "Im the ColorBar")
(*** condition: ipynb ***)
#if IPYNB
heat3
#endif // IPYNB
(***hide***)
heat3 |> GenericChart.toChartHTML
(***include-it-raw***)
(**
## Annotated Heatmaps
use `Chart.AnnotatedHeatmap` to add an annotation text to each z value:
*)
let heat4 =
Chart.AnnotatedHeatmap(
zData = [
[1..5]
[6..10]
[11..15]
],
annotationText = [
["1,1";"1,2";"1,3"]
["2,1";"2,2";"2,3"]
["3,1";"3,2";"3,3"]
],
X = ["C1";"C2";"C3"],
Y = ["R1";"R2";"R3"],
ReverseYAxis = true
)
(*** condition: ipynb ***)
#if IPYNB
heat4
#endif // IPYNB
(***hide***)
heat4 |> GenericChart.toChartHTML
(***include-it-raw***)