(** // can't yet format YamlFrontmatter (["title: Contour plots"; "category: Distribution Charts"; "categoryindex: 5"; "index: 4"], Some { StartLine = 2 StartColumn = 0 EndLine = 6 EndColumn = 8 }) to pynb markdown # Contour plots [![Binder](https://plotly.net/img/badge-binder.svg)](https://mybinder.org/v2/gh/plotly/Plotly.NET/gh-pages?filepath=4_3_contour-plots.ipynb)  [![Script](https://plotly.net/img/badge-script.svg)](https://plotly.net/4_3_contour-plots.fsx)  [![Notebook](https://plotly.net/img/badge-notebook.svg)](https://plotly.net/4_3_contour-plots.ipynb) *Summary:* This example shows how to create contour plot in F#. let's first create some data for the purpose of creating example charts: *) open System open Plotly.NET // Generate linearly spaced vector let linspace (min,max,n) = if n <= 2 then failwithf "n needs to be larger then 2" let bw = float (max - min) / (float n - 1.) [|min ..bw ..max|] // Create example data let size = 100 let x = linspace(-2. * Math.PI, 2. * Math.PI, size) let y = linspace(-2. * Math.PI, 2. * Math.PI, size) let f x y = - (5. * x / (x**2. + y**2. + 1.) ) let z = Array.init size (fun i -> Array.init size (fun j -> f x.[j] y.[i] ) ) (** A contour plot is a graphical technique for representing a 3-dimensional surface by plotting constant z slices, called contours, on a 2-dimensional format. That is, given a value for z, lines are drawn for connecting the (x,y) coordinates where that z value occurs. The contour plot is an alternative to a 3-D surface plot. The contour plot is an alternative to a 3-D surface plot. *) let contour1 = z |> Chart.Contour |> Chart.withSize(600.,600.)(* output:
*)