<s> """<STR_LIT>""" <EOL> import sys , csv <EOL> import numpy as np <EOL> import argparse <EOL> parser = argparse . ArgumentParser ( ) <EOL> parser . add_argument ( "<STR_LIT>" , help = "<STR_LIT>" ) <EOL> parser . add_argument ( "<STR_LIT>" , help = "<STR_LIT>" ) <EOL> parser . add_argument ( "<STR_LIT>" , help = "<STR_LIT>" , <EOL> action = "<STR_LIT:store_true>" , default = False ) <EOL> parser . add_argument ( "<STR_LIT>" , "<STR_LIT>" , help = "<STR_LIT>" , <EOL> type = int , default = False ) <EOL> args = parser . parse_args ( ) <EOL> i = open ( args . input_file ) <EOL> reader = csv . reader ( i ) <EOL> writer = csv . writer ( open ( args . output_file , '<STR_LIT:wb>' ) ) <EOL> if args . header : <EOL> first_line = reader . next ( ) <EOL> n = <NUM_LIT:0> <EOL> for line in reader : <EOL> n += <NUM_LIT:1> <EOL> if not line : <EOL> break <EOL> if args . label_index : <EOL> line . pop ( args . label_index ) <EOL> x = np . array ( map ( float , line ) ) <EOL> x2 = np . square ( x ) <EOL> if n == <NUM_LIT:1> : <EOL> sums_x = x <EOL> sums_x2 = x2 <EOL> else : <EOL> sums_x += x <EOL> sums_x2 += x2 <EOL> print n <EOL> print sums_x <EOL> print sums_x2 <EOL> means = sums_x / n <EOL> sums2_x = np . square ( sums_x ) <EOL> variances = sums_x2 / n - sums2_x / ( n ** <NUM_LIT:2> ) <EOL> standard_deviations = np . sqrt ( variances ) <EOL> if args . header : <EOL> writer . writerow ( first_line ) <EOL> writer . writerow ( means ) <EOL> writer . writerow ( standard_deviations ) </s>
