# file: lecture_04/rank.py
#                                                                              
# revision history:                                                            
#
# 20230906 (JP): initial version
#                                                                              
# This file contains an implementation of a method to compute the rank
# of a matrix.

# The input to this program is a text file containing a comma-separated
# list of matrix values:
#
#  python eg.py <filename>
#
#------------------------------------------------------------------------------

# import required system modules                                               
#
import os
import sys
import numpy as np

#------------------------------------------------------------------------------
#
# main program
#
#------------------------------------------------------------------------------
 
# load a matrix from a file
#
mat = np.loadtxt(sys.argv[1], dtype='f', delimiter=',')
print("matrix:")
print(mat)

# compute the rank
#
print("rank is %d" % (np.linalg.matrix_rank(mat)))

#
# end of file