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

Numpy Math Functions

Returns array with ceil values of the elements.

ceil : The lowest integer higher 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.ceil(ar))

Output

[ 2.  3.  3. -3. -3.]

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.ceil(ar,out=ar_out)
print(ar_out)

Output ( the array ar_out stores the output values )

[ 2.  3.  3. -3. -3.]

We can exclude elements for which ceil 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.ceil(ar,where=ar_where))

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

[ 2.    2.09  3.   -3.41 -3.  ]