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Parameters Return value Examples Rounding to the nearest integer Rounding values to the 1st decimal place Rounding values to the nearest 10th

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NumPy | around method

schedule Aug 12, 2023

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Parameters Return value Examples Rounding to the nearest integer Rounding values to the 1st decimal place Rounding values to the nearest 10th

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Numpy's around(~) method rounds up and down the values in the input array.

Parameters

1. a | array_like

The input array.

2. decimals | int | optional

The number of decimals to round to. Note that decimals=1 would mean that values like 1.52 will be rounded to 1.5. On the other hand, decimals=-1 would round values like 13 to 10 (i.e. nearest 10th).

Return value

A scalar is returned if a is a scalar, otherwise a Numpy array is returned.

WARNING

Numbers ending in 5 will be rounded down.

Numbers such as 2.5 and 3.45 will be rounded down to 2 and 3.4, respectively, instead of rounding up.

Examples

Rounding to the nearest integer


        
        
            
                
                
                    x = np.array([2.3,2.5,2.7])
np.round(x)
                
            
            array([2., 2., 3.])

Rounding values to the 1st decimal place

Set 1 as the second parameter:


        
        
            
                
                
                    x = np.array([2.3,2.5,2.7])
np.around(x,1)
                
            
            array([2.3, 2.5, 2.7])

Rounding values to the nearest 10th

Set -1 as the second parameter:


        
        
            
                
                
                    x = np.array([4,12,16])
np.around(x,-1)
                
            
            array([ 0, 10, 20])

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Published by Isshin Inada

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