Hello,

I am inputing a 17 x 17 symetric matrix to sammon.  The matrix is a co-occurance matrix with no missing data.  If this is at all relevant, running hclust on this matrix works.

> samx <- sammon(q23axproduct)

I receive the following error:

Error in sammon(q23axproduct) : initial configuration must be complete

In addition: Warning messages: 

1: some of the first 2 eigenvalues are < 0 in: cmdscale(d, k) 

2: NaNs produced in: sqrt(ev) 

> 

Any suggestions of what is happening and how to rectify this?

Thanks

Gregory L. Blevins 

The Market Solutions Group

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