Hi All, Does anyone know of any issues at all with using; Cor(df,method = ³kendall²) On a dataframe (df) 13 columns wide say? Seems to hang my system for a while in calculating the correlation matrix appreciate it is doing some ranking calculations so I am expecting too much that it should return immediately ? In particular trying to use function in Excel (reval) and I am getting OLE error boxes as RGUI hangs. Many Thanks. Glenn [[alternative HTML version deleted]]