You can't really plot two x-axis variables, but you can display the dates via the block variables that are in the IRCHART syntax. For example, if year month and day are variables in your data set with obvious meaning, then this would give you a chart with effectively 2 different x-axes. IRCHART HUMIDITY*BATCH(year month day); I think for this to work properly, the data would have to be sorted by year month and day, and also by batch (which of course should have the same sort order as year month day) ... View more