Dear members of R-mailing list,
I am using Sammon's Non-Linear Mapping in R as implemented in MASS
package. I have two distance matrices (attached with the mail).
For the first (/5HT_MACCS_dist.dat/) /sammon()/ works fine but for the
second (/5HT_TGT_dist.dat/), I get an error message "configuration has
duplicates". I checked both the matrices for duplicate values using/
cmdscale()/ as the initial configuration is generated using this. Both
matrices generate duplicate coordinates! I have no idea where the
problem lies. However, /isoMDS()/ works well with both.
My reasoning has hit a wall!! Please help!!
Regards,
Preeti Iyer
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