Hi everyone, I'm new in this Bioconductor project so I hope you help me guys! I'm using the MAplot funcion (AffyPLM package) with an AffyBatch object and when the number of reference arrays is greater than 1, the R console gives the following warning: In if (i != ref) { : the condition has a lengt >1 and the first element will be used The MA plots are painted, but I don't know if the calculations inside the MAplot function are performed well. If the object is an expression set, there are no warnings. Any tips?? Thanks in advance, Javier