fschart

gistfile1.txt

- let countryData = 
-     ["Africa", 345;
-      "england", 128;
-      "us", 543 ];;

val countryData : (string * int) list =
  [("Africa", 345); ("england", 128); ("us", 543)]

> Chart.Bar countryData
- ;;

  Chart.Bar countryData
  ^^^^^

/home/greg/src/chart-example/stdin(12,1): error FS0039: The namespace or module 'Chart' is not defined
> open FSharp.Charting;;
> Chart.Bar countryData;;
System.ArgumentNullException: Value cannot be null.
Parameter name: key
  at System.ThrowHelper.ThrowArgumentNullException (ExceptionArgument argument) <0x7f8af18b70c0 + 0x00021> in <filename unknown>:0 
  at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (System.Collections.Generic.TKey key) <0x40f95b00 + 0x00033> in <filename unknown>:0 
  at System.Collections.Generic.Dictionary`2[TKey,TValue].ContainsKey (System.Collections.Generic.TKey key) <0x40f95ac0 + 0x00019> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes.layoutSubCharts@798 (SeriesChartType chartType, System.Collections.Generic.Dictionary`2 visited, Microsoft.FSharp.Core.FSharpOption`1 targetParent, System.Object target) <0x40f95630 + 0x0004d> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes.layoutSubCharts@798 (SeriesChartType chartType, System.Collections.Generic.Dictionary`2 visited, Microsoft.FSharp.Core.FSharpOption`1 targetParent, System.Object target) <0x40f95630 + 0x002e3> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes+layoutSubCharts@798-1.Invoke (Microsoft.FSharp.Core.FSharpOption`1 targetParent, System.Object target) <0x40f955e0 + 0x0002b> in <filename unknown>:0 
  at Microsoft.FSharp.Core.OptimizedClosures+Invoke@3252[T2,TResult,T1].Invoke (T2 u) <0x40083440 + 0x00029> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes+applyPropertyDefaults@810-1[a].Invoke (a arg10) <0x40f955b0 + 0x00021> in <filename unknown>:0 
  at Microsoft.FSharp.Core.FSharpFunc`2[T,TResult].InvokeFast[V] (Microsoft.FSharp.Core.FSharpFunc`2 func, Microsoft.FSharp.Core.T arg1, Microsoft.FSharp.Core.TResult arg2) <0x400531a0 + 0x000a5> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes.applyPropertyDefaults[a] (SeriesChartType chartType, FSharp.Charting.a target) <0x40f95110 + 0x0016f> in <filename unknown>:0 
  at FSharp.Charting.ChartTypes+GenericChart..ctor (SeriesChartType chartType) <0x40f94a00 + 0x00173> in <filename unknown>:0 
  at FSharp.Charting.Chart.Bar[a,b,c] (IEnumerable`1 data, Microsoft.FSharp.Core.FSharpOption`1 Name, Microsoft.FSharp.Core.FSharpOption`1 Title, Microsoft.FSharp.Core.FSharpOption`1 Labels, Microsoft.FSharp.Core.FSharpOption`1 Color, Microsoft.FSharp.Core.FSharpOption`1 XTitle, Microsoft.FSharp.Core.FSharpOption`1 YTitle) <0x40f78650 + 0x00057> in <filename unknown>:0 
  at <StartupCode$FSI_0008>.$FSI_0008.main@ () <0x40f785a0 + 0x00047> in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) <0x7f8af19ab910 + 0x000a1> in <filename unknown>:0 
Stopped due to error