ufunc Finding LCM

Finding LCM (Lowest Common Multiple)

The Lowest Common Multiple is the smallest number that is a common multiple of two numbers.

Example

  import numpy as np

num1 = 4
num2 = 6

x = np.lcm(num1, num2)

print(x)

Note: Returns: 12 because that is the lowest common multiple of both numbers (43=12 and 62=12).

Finding LCM in Arrays

To find the Lowest Common Multiple of all values in an array, you can use the reduce() method.

Note: The reduce() method will use the ufunc, in this case the lcm() function, on each element, and reduce the array by one dimension.

Example

  import numpy as np

arr = np.array([3, 6, 9])

x = np.lcm.reduce(arr)

print(x)

Note: Returns: 18 because that is the lowest common multiple of all three numbers (36=18, 63=18 and 9*2=18).

Example

  import numpy as np

arr = np.arange(1, 11)

x = np.lcm.reduce(arr)

print(x)