An adjacency matrix can represent a more general graph structure than the tree structure of a dendrogram.

There are no graphing functions in NMath, but many of our customers use NMath in conjunction with other charting packages, such as Infragistics (http://www.infragistics.com/), Syncfusion (http://www.syncfusion.com/), Nevron (http://www.nevron.com/), and SoftwareFX (http://www.softwarefx.com/). If you want a full-featured dendrogram, I’d suggest you check out these products to see what’s available.

I do have some C# code I wrote to draw the first two dendrograms shown above from ClusterAnalysis objects (using System.Drawing). I’d be happy to send it to you if you want to try rolling your own solution. Email me at baldwin@centerspace.net, if you’re interested.

Ken