Python | numpy.nanmean() function
numpy.nanmean() function can be used to calculate the mean of array ignoring the NaN value. If array have NaN value and we can find out the mean without effect of NaN value.
Syntax: numpy.nanmean(a, axis=None, dtype=None, out=None, keepdims=))
a: [arr_like] input array
axis: we can use axis=1 means row wise or axis=0 means column wise.
out: output array
dtype: data types of array
overwrite_input: If True, then allow use of memory of input array a for calculations. The input array will be modified by the call to median.
keepdims: If this is set to True, the axes which are reduced are left in the result as dimensions with size one. With this option, the result will broadcast correctly against the original a.
Returns: Returns the average of the array elements
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Shape of array is (2, 3) Mean of array without using nanmean function: nan Using nanmean function: 26.4
Shape of array is (4, 3) Mean of array with axis = 0: [ 26.5 29.75 nan] Using nanmedian function: [ 26.5 29.75 16.5 ]
Shape of array is (4, 3) Mean of array with axis = 1: [ 25.33333333 nan nan 9. ] Using nanmedian function: [ 25.33333333 55. 22.5 9. ]