updated to handle:
updated to handle:

1. One single column of numeric data
2. More than 2 replicate groups
3. Replicate groups consisting of one single sample

chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster,chipster/chipster