# fraction-under-selection
Python function for estimating the fraction of sites under purifying selection or positive selection

# PREREQUISITE
  Scipy,  Numpy
 
# INPUT
 Two SFS files: Test SFS & reference SFS
 Consisted of site freqeuncy spectrum (1,2,..., N-1), where N is number chromosomes. 


# USAGE
estimatef.py test_SFS_file ref_SFS_file
Command line example:  
> python estimate.py ex_test.sfs ex_ref.sfs

# CITATION 
Sunjin Moon & Joshua Akey, 2015