Dear R users,

I discovered something strange using the function agnes() of the cluster
package on R 3.0.1 and on R 2.14.1. Indeed, the clusterings obtained are
different whereas I ran exactly the same code.

I quickly looked at the source code of the function and I discovered that
there was an important change: agnes() in R 2.14.1 used a FORTRAN code
whereas agnes() in R 3.0.1 uses a C code.

Here is one of the contingency table between R 2.14.1 and R 3.0.1:
                                   classe.agnTani.2.14.1
classe.agnTani.3.0.1      1        2       3
                              1    74       0    229
                              2     0    235        0
                              3  120       0      15

So, I was wondering if it was normal that the C and FORTRAN codes give
different results?

Best regards,

Hugo Varet

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