Filter data with recursive (IIR) or nonrecursive (FIR) filter
filter is a MATLAB® function.
Use designfilt to generate d based on frequency-response specifications.
x can be a double- or single-precision vector. It can also be a matrix with as many columns as there are input channels.
The denominator of FIR filters is, by definition, equal to 1. To use the filter function with the b coefficients from an FIR function, use y = filter(b,1,x).