Hi, 

Thank you for all support so far. 

I was looking back at previous posts, but couldn't find any question , so I will ask: 

Is it possible to change metadata associated with dba object after dba.counts call. I am trying to understand my principal components better, and for that I would need more associated data. I could not find a way how to add extra data, so I wondered if it is possible to change existing data for  Tissue or Replicate? 

Kind Regards

Lauma 

While not part of the "official" interface, you can access the metadata fields directly:

myDBA$class[DBA_TISSUE, ]
myDBA$class[DBA_FACTOR, ]
myDBA$class[DBA_CONDITION, ]
myDBA$class[DBA_TREATMENT, ]
myDBA$class[DBA_REPLICATE, ]

You can set these to vectors of character strings to change the values.