GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

1
<Verb>DisplayDendrogramMat(A,t,s):: Mat, Rat, Int --> Void</Verb><P/>
2

3
<P/> Inputs an <M>n\times n</M>
4
 symmetric matrix <M>A</M> over the rationals, a rational 
5
<M>t \ge 0</M> and an integer <M>s \ge 1</M>. 
6
 The dendrogram defined by <B>DendrogramMat(A,t,s)</B> is displayed.
7

8

9

10