Median Filter (Not in Base Package)

Applies a median filter of rank to the input sequence X. Details  Example

	X is the input signal to filter. The number of elements, n, in X must be greater than the rank, n > rank 0. If the number of elements in X is less than or equal to rank, the VI sets Filtered X to an empty array and returns an error.
	rank must be greater than or equal to zero. The default is 2. If rank is less than zero, the VI sets the output Filtered X to an empty array and returns an error.
	Filtered X is the output array of filtered samples. The size of this array is the same as the input array X.
	error returns any error or warning from the VI. You can wire error to the Error Cluster From Error Code VI to convert the error code or warning into an error cluster.

Median Filter Details

The Median Filter VI obtains the elements of Filtered X using the following equation.

y_i = Median(J_i) for i = 0, 1, 2, …, n – 1,

where Y represents the output sequence Filtered X, n is the number of elements in the input sequence X, J_i is a subset of the input sequence X centered about the i^th element of X, and the indexed elements outside the range of X equal zero. J_i is given by the following equation.

J_i = {x_{i – r}, x_{i – r + 1}…, x_{i – 1}, x_i, x_{i + 1}…, x_{i + r – 1}, x_{i + r}},

where r is the filter rank.

Example

Refer to the Median Filtering VI in the labview\examples\analysis\fltrxmpl.llb directory for an example of using the Median Filter VI.