CLUSTERING
Category: User Defined Function.
Description: Perform a clusering analysis on the selected similarity or distance matrix. 
It will open a phenetic tree or 3 dimensional graph depending on the clustering method used.
Syntax: CLUSTERING(Range of the square matrix, Range containing labels of objects, Clustering method, [Section of matrix to use], [Title of analysis])
The CLUSTERING function syntax has the following arguments:
Range of the square matrix: Required. Selected the range of the similarity/distance matrix.
Range containing labels of objects.
Clustering method. Possible parameters are:
- 
UPGMA for Unweighted Pair Group Method with Arithmetic Mean.
 - 
WPGMA for Weighted Pair Group Method with Arithmetic Mean
 - 
UPGMC for Centroid Unweighted Pair Group Method.
 - 
WPGMC for Centroid Weighted Pair Group Method.
 - 
NJ for Neighbor Joining.
 - 
LANCE for Lance & Williams flexible clustering.
 - 
COMPLETE for Complete linkage.
 - 
SINGLE for Single linkage.
 - 
MDS for Multiple Dimensional Scaling.
 
Section of matrix to use: Optional. Possible parameters:
- 
BOTH, (default value) will calculate the average between the upper and lower sections of the matrix.
 - 
UPPER, only the upper section will be used (above the diagonal).
 - 
LOWER, only the lower section will be used (below the diagonal).
 
Title of analysis: Optional.
