FSharpChart now supports binding for Stacked Charts and for modifying the Marker associated with a series.

As always one can download the latest release from:

http://code.msdn.microsoft.com/FSharpChart-b59073f5 

In previous versions of FSharpChart it was not very intuitive how a Stacked Chart could be plotted. What one had to do was define a CombinedChart where one defines the charts to be combined with the same StackedGroupName property value:

let rndStacked = new System.Random()
let dataX() = [ for f in 1 .. 10 -> rndStacked.NextDouble() * 10.0]

FSharpChart.Combine
  [ FSharpChart.StackedBar100(dataX(), StackedGroupName = "g1")
    FSharpChart.StackedBar100(dataX(), StackedGroupName = "g1")
    FSharpChart.StackedBar100(dataX(), StackedGroupName = "g1") ]

This displays the following chart:

image

(Thanks to Tomas Petricek for this sample)

This approach also allows one to easily combine multiple Stacked Charts using different StackedGroupName properties:

FSharpChart.Combine
  [ FSharpChart.StackedBar(dataX(), StackedGroupName = "g1")
    FSharpChart.StackedBar(dataX(), StackedGroupName = "g1")
    FSharpChart.StackedBar(dataX(), StackedGroupName = "g1")
    FSharpChart.StackedBar(dataX(), StackedGroupName = "g2")
    FSharpChart.StackedBar(dataX(), StackedGroupName = "g2") ]

This displays the following chart:

image

However, for Stacked Charts, a more intuitive approach would be just to specify a list of data series. With this new release one can now specify the data series using the following formats:

list<list<'TY>>
list<list<'TX * 'TY>>

This now allows one to define, say a StackedColumn chart, using the much simpler expression:

let rndStacked = new System.Random()
let dataXY() = [ for f in 1 .. 10 -> (f, round (rndStacked.NextDouble() * 100.0))]

[dataXY(); dataXY(); dataXY()]
|> FSharpChart.StackedColumn
|> FSharpChart.WithSeries.DataPoint(Label="#VAL")

This displays the following chart:

image

Hopefully you will agree this is much simpler and more intuitive. The only current limitation of this binding approach is that one cannot use a CombinedChart for multiple Stacked Charts when binding in this fashion. If this is the desire then the previous approach with distinct StackedGroupName properties is needed.

The download also includes a new WinForms sample demonstrating how bindings can be managed for these Stacked Charts.

thanks to a community suggestion I have also added support for modifying the Marker associated with a series. To modify the Marker for a Data Series one can now write:

[ for i in 1. .. 20. .. 1000.0 -> i, rnd.NextDouble() ]
|> FSharpChart.Line
|> FSharpChart.WithSeries.Marker(Color=Color.Red, Style=MarkerStyle.Cross)

Again, this displays the chart:

image

Don’t forget the package is also available from NuGet:

http://www.nuget.org/List/Packages/MSDN.FSharpChart.dll

Once again enjoy!

Written by Carl Nolan