Mathematics

abs: Absolute value or modulus.
angle: Phase angle.
coeffs: Coefficients of the polynomial.
conv: Convolution and polynomial multiplication.
conv2: Two-dimensional convolution.
cos: The cosine of the argument is in radians.
deconv: Reverse convolution transformation (deconvolution) by of polynomial division.
fft: Fast Fourier transform.
fft2: Two-dimensional 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.
ifft2: Two-dimensional inverse fast Fourier transform.
ifftshift: Reverse zero frequency shift.
interp1: One-dimensional data interpolation (search table).
pchip: Piecewise Cubic Hermite Interpolating Polynomial (PCHIP).
randn: Normally distributed random numbers.
sin: The sine of the argument is in radians.
spline: Cubic spline data interpolation.