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NumPy | fabs method

schedule Aug 12, 2023

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Parameter Return Value Examples Basic Usage

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NumPy's np.fabs(~) method returns a NumPy array with the absolute value applied to each of its value.

NOTE

There is a difference between np.abs() and np.fabs() methods. The f in fabs() denotes float, which means that the return type for fabs() is always float. On the other hand, np.abs() returns the same data type as the input array.

Parameter

1. x | array-like

The source NumPy array.

Return Value

A NumPy array of floats with the absolute value applied to each of its value.

Examples

Basic Usage

Suppose we have the following NumPy array:


        
        
            
                
                
                    x = np.array([[-1,2], [3,-4]])
x
                
            
            array([[-1, 2],
       [3, -4]])

To convert all negatives to positives, use the abs() method like follows:


        
        
            
                
                
                    np.fabs(x)
                
            
            array([[1., 2.],
       [3., 4.]])

Notice the numbers have a . in them - this means that they are of data-type float.

Also, note that the source NumPy array is left intact, that is, x in this example would still have negative values.

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Published by Isshin Inada

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