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NumPy | flipud method

schedule Aug 12, 2023

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Parameters Return value Examples

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NumPy's flipud(~) method reverses the ordering of the elements row-wise (vertical flip). Note that this method does not flip bits (i.e. turns 0s into 1s, and 1s into 0s).

This method is equivalent to np.flip(a, axis=0), where a is the input array.

Parameters

1. a | array-like

The input array.

Return value

A NumPy array with the input elements reversed row-wise.

Examples

Consider the following 2D array:


        
        
            
                
                
                    a = np.array([[1,2,3],[4,5,6],[7,8,9]])
a
                
            
            array([[1, 2, 3],
       [4, 5, 6],
       [7, 8, 9]])

To reverse the ordering of the elements row-wise:


        
        
            
                
                
                    np.flipud(a)
                
            
            array([[7, 8, 9],
       [4, 5, 6],
       [1, 2, 3]])

Here, the first row became the last element.

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Published by Isshin Inada

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