numpy standard deviation of each column code example

Example 1: numpy stdev

# Calculate standard deviaton based on population/sample
import numpy as np
values = [1,5,4,3,3,4]
# as default, std() calculates basesd on a population
# by specifying ddof=1, it calculates based on the sample
np.std(values)				# ==1.247219128924647
np.std(values ,ddof=1)		# ==1.3662601021279464

Example 2: numpy standard deviation

import numpy as np
data = [68,86,36,57,24,46,32,53] #define some data
data_std = np.std(data) #outputs 19.00493356999703