Mathematics

coeffs: Coefficients of the polynomial.
conv: Convolution and polynomial multiplication.
conv2: Two-dimensional convolution.
cos: The cosine of the argument is in radians.
fft: Fast Fourier transform.
fftshift: The shift of the constant component to the center of the spectrum.
filter: One-dimensional digital filter.
ifft: The inverse fast Fourier transform.
ifftshift: Reverse zero frequency shift.
sin: The sine of the argument is in radians.