>Error in isoMDS(Gquad.dist) : zero or negative distance between objects
>179 and 180.
>How can I handle this, is it valid to add 0.5 to every element in the
>distance matrix or is someother alternative more appropriate?
This means that your objects 179 and 180 are identical so just remove one of
the two. They both have the same distance to all other objects so your
results shouldn't change. Whatever conclusion you draw from the location of
one on your plot, you can say the same for the other.
Silvia.
Thanks in advance
Steve
Steve Friedman, PhD
Everglades Division
Senior Environmental Scientist, Landscape Ecology
South Florida Water Management District
3301 Gun Club Road
West Palm Beach, Florida 33406
email: [EMAIL PROTECTED]
Office: 561 - 682 - 6312
Fax: 561 - 682 - 5980
If you are not doing what you truly enjoy its your obligation to
yourself to change.
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