Creating NumPy Arrays

gist_numpy_1.py

# import numpy
import numpy as np 

# create numpy array from lists
np1 = np.array([1, 3, 5, 7, 9])
np1

# use the range function to create array
np2 = np.array(range(6))
np2

# array of sequential values
np3 = np.arange(0, 6)
np3

# step value 
# increment by 2
np4 = np.arange(2, 20, 2)
np4

# decrement by 2
np5 = np.arange(20, 2, -2)
np5

# linspace() function
np6 = np.linspace(5, 25)
np6

# 10 values between 10 & 50
np7 = np.linspace(10, 50, 10)
np7

# array of zeros
np_zero = np.zeros(5)
np_zero

# two dimensional arrays
# list of lists
np8 = np.array([[2, 4], [6, 8]])
np8

# reshape method
# create a one dimensional array
np9 = np.arange(0, 12)
np9.reshape(3, 4)
np9

# array description
np10 = np.arange(0, 10)
np10

# array type
type(np10)

# array size
np.size(np10)

# data type
np10.dtype

# two dimensional array
np11 = np10.reshape(2, 5)
np11

# array type
type(np11)

# array size
np.size(np11)

# size of rows
np.size(np11, 0)

# size of columns
np.size(np11, 1)

# data type
np11.dtype