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Method argpartition

NumPy Random Generator4 topics

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NumPy | ptp method

schedule Aug 12, 2023

Last updated

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Python●NumPy

Parameters

1. a | array-like

The input array.

2. axislink | None or int | optional

The axis along which to compute the range. For 2D arrays, the allowed values are as follows:

Axis	Meaning
0	Compute the range column-wise
1	Compute the range row-wise
None	Compute the range on a flattened array

By default, axis=None.

3. out | Numpy array | optional

Instead of creating a new array, you can place the computed result into the array specified by out.

Return value

If q is a scalar, then a scalar is returned. Otherwise, a Numpy array is returned.

Examples

Computing the range of a 1D array

To compute the range of a 1D array:


        
        
            
                
                
                    np.ptp([5,6,7,8,9])
                
            
            4

Computing the range of a 2D array

Suppose we have the following 2D array:


        
        
            
                
                
                    a = np.array([[5,6],[7,8]])
a
                
            
            array([[5, 6],
       [7, 8]])

Flattened

To compute the range of the flattened version of a:

Column-wise

To compute the range column-wise:


        
        
            
                
                
                    np.ptp(a, axis=0)
                
            
            array([2, 2])

Row-wise

To compute the range row-wise:


        
        
            
                
                
                    np.ptp(a, axis=1)
                
            
            array([1, 1])

Published by Isshin Inada

Edited by 0 others

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