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filt!

..  filt!(out, b, a, x, [si])

Same as :func:`filt` but writes the result into the ``out`` argument,
which may alias the input ``x`` to modify it in-place.

Examples

In the Julia programming language, the function filt!(out, b, a, x, [si]) is similar to filt, but it writes the result into the out argument, which may alias the input x to modify it in-place.

julia> out = similar(x);
julia> filt!(out, b, a, x)

This function performs filtering on the input signal x using the filter coefficients provided by b and a, and stores the result in the out array.

Common examples of its use:

1. Filter an array in-place:

   julia> x = [1.0, 2.0, 3.0, 4.0, 5.0];
   julia> b = [0.5, 0.5];
   julia> a = [1.0, -0.5];
   julia> out = similar(x);
   julia> filt!(out, b, a, x)
   5-element Array{Float64,1}:
   0.5
   1.5
   2.75
   4.125
   5.28125

   This example filters the array x in-place using the filter coefficients b and a, and stores the filtered result in the out array.

2. Modify an existing array with filtering:

   julia> x = [0.2, 0.6, 0.9, 1.2, 0.7];
   julia> b = [1.0, -1.0];
   julia> a = [1.0, 0.5];
   julia> filt!(x, b, a, x)
   5-element Array{Float64,1}:
   0.2
   0.4
   0.3
   0.5
   0.35

   In this example, the x array is modified in-place with the filtered result using the filter coefficients b and a.

Note: The optional si argument is not shown in the examples as its usage depends on specific use cases.

See Also

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