ufunc Rounding Decimals

Rounding Decimals

There are primarily five ways of rounding off decimals in NumPy:

• truncation
• fix
• rounding
• floor
• ceil

Truncation

Remove the decimals, and return the float number closest to zero. Use the trunc() and fix() functions.

Example

  import numpy as np

arr = np.trunc([-3.1666, 3.6667])

print(arr)

Example

  import numpy as np

arr = np.fix([-3.1666, 3.6667])

print(arr)

Rounding

The around() function increments preceding digit or decimal by 1 if >=5 else do nothing.

E.g. round off to 1 decimal point, 3.16666 is 3.2

Example

  import numpy as np

arr = np.around(3.1666, 2)

print(arr)

Floor

The floor() function rounds off decimal to nearest lower integer.

E.g. floor of 3.166 is 3.

Example

  import numpy as np

arr = np.floor([-3.1666,
  3.6667])

print(arr)

Ceil

The ceil() function rounds off decimal to nearest upper integer.

E.g. ceil of 3.166 is 4.

Example

  import numpy as np

arr = np.ceil([-3.1666,
  3.6667])

print(arr)