Example of using a Sitecore SPEAK Pie chart component in the Experience Analytics Dashboard.
solution Requires Sitecore 8 preferably Update 3.
Add references to:
\bin\Sitecore.Analytics.dll \bin\Sitecore.ExperienceAnalytics.dll \bin\Sitecore.Kernel.dll \bin\Sitecore.Services.Client.dll \bin\Sitecore.Services.Core.dll \bin\Sitecore.Services.Infrastructure.dll
Download all the items required in the /Sitecore packages folder