Numpy math floor() function to get floor of all elements of the array.

Returns array with floor values of the elements.

floor : The highest integer lower than the input number.

`a`	Input array with numbers
`out`	Optional , ndarray to store result
`where`	Optional , array with True to get values and False to leave the value

Examples

We will use the options in our sample scripts.

import numpy as np
ar=np.array([1.57, 2.09,  2.79,-3.41,-3.62])
print(np.floor(ar))

Output

[ 1.  2.  2. -4. -4.]

We can store the output in an array. We used empty_like() to create array (ar_out) of same shape() of our main array ar.

import numpy as np
ar=np.array([1.57, 2.09,  2.79,-3.41,-3.62])
ar_out=np.empty_like(ar)
np.floor(ar,out=ar_out)
print(ar_out)

Output ( the array ar_out stores the output values )

[ 1.  2.  2. -4. -4.]

We can exclude elements for which floor value is not required. This we can decide by using another array filled with True and False.

import numpy as np
ar=np.array([1.57, 2.09,  2.79,-3.41,-3.62])
ar_where=np.array([True,False,True,False,True])
print(np.floor(ar,where=ar_where))

Output (floor() is not applied to our 2^nd and 4 elements of the input array )

[ 1.    2.09  2.   -3.41 -4.  ]