Select a data set to present
Use the dataset select for you, it should habe at least two different classes and more than 4 samples per class.
https://drive.google.com/open?id=1r0eEphhvTwI72avq0HVNfoy-OPaXJQtifR0--NVF9aQ
An overview of your data can be fin using the following link:
http://www.ncbi.nlm.nih.gov/sites/GDSbrowser/