Re: Scale on ordination axes


Hi Tom

Basically ‘no’. As mentioned in the post to Rainman, SSH in PATN is a multidimensional scaling algorithm and the axes are somewhat arbitrary. Take a look at the Help on SSH and see how the algorithm works. It is very simple (and very effective).

Basically the scaling is standardized (one unit of distance) from an originally random set of coordinates in the selected dimensionality. The relationship BETWEEN the points in the cordinate system is not arbitrary.

I’m not sure exacly what you mean by “distance between points can be related between axes?”.

You could calculate the distance between points by exporting the ordination and then importing it as data and calculating the Euclidean Distance between objects.