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What does PNCOMP do ?
Program PNCOMP produces a reduced-space ordination using the
method of principal component analysis (PCA) described in all textbooks
of multivariate statistics. That very general method of analysis
includes several variants; the main ones are briefly discussed in Table
3 of the documentation.
We have written only a Macintosh version of this program, since many
other packages offer this type of analysis on mainframes. The
computations are made from a raw data table, which may contain missing
values. The program produces graphs as well as a file of results, if
the user request them. For the time being, the program can handle no
more than 55 variables
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