Hello Graeme On 18-Jan-2011, Graeme Gill wrote: > Another way is simply to cut and paste all the values together > into the same .ti3 file, adjust the NUMBER_OF_SETS appropriately, > and run colprof. It will be slower than averaging the values > up front, but the end result will be the same. Mmm... really, why didn't I think of that before ?! Unless having duplicate SAMPLE_IDs in the ti3 might lead to some unpredictable side effect... /&