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"""To get a new array by subsetting columns of different np.ndarray"""

a = np.array([[1,2],[3,4],[5,6]])
b = np.array([[10,20],[30,40],[50,60]])

# Using zip 
[(a_s[0], b_s[0]) for a_s, b_s in zip(a,b)]

# A faster way is to concat and ravel, use ('float, float') if float number. 
np.c_[a[:,0],b[:,0]].view('i,i').ravel()

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# This code covert formant bandwidth to q
import sys

f0 = map(float, sys.argv[1].strip('[]').split(','))
bw = map(float, sys.argv[2].strip('[]').split(','))
q = []

if (not len(f0)==len(bw)):
	print "Error: Two arguments need to have the same lenght. "
	print 'Usage: First argument list of fundamental frequency, e.g "[19, 299, 449]"'

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def within_subject_errorbar(df, ci_r = 1.96):
    df["Subject average"] = df.mean(axis = 1)
    df_grand_avg =  df["Subject average"].mean()
    df["New condition1"] = df["condition1"] - df["Subject average"] + df_grand_avg
    df["New condition2"] = df["condition2"] - df["Subject average"] + df_grand_avg
    std_vo, std_me = df["New condition1"].std(), df["New condition2"].std()

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def dbfft(x, fs, win=None, ref=32768):
    """
    Calculate spectrum in dB scale
    Args:
        x: input signal
        fs: sampling frequency
        win: vector containing window samples (same length as x).
             If not provided, then rectangular window is used by default.
        ref: reference value used for dBFS scale. 32768 for int16 and 1 for float

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for (std::vector<int>::const_iterator i = vecName.begin(); i != vecName.end(); ++i)
  std::cout << *i << std::endl;

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import os

file_names = os.listdir("file_path")

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n_columns_ndarray = long_audio_vector.reshape((-1, num_of_channels))

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## Session Management

Sessions are useful for completely separating work environments. I have a ‘Work’ session and a ‘Play’ session; in ‘Work’, I keep everything open that I need during my day-to-day development, while in ‘Play’, I keep open current open-source gems or other work I hack on at home.

	tmux new -s session_name
creates a new tmux session named session_name
	tmux attach -t session_name
attaches to an existing tmux session named session_name
	tmux switch -t session_name
switches to an existing session named session_name

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import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
  home: MyApp(),
  ));

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

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a = np.arange(10)  # (10, )

a.reshape(-1, 1)   # (10, 1)