Internal or barely commented functions not exported from the Namespace.
# MOSTLY MATLAB/OCTAVE COMPATIBLE UTILITIES
fractdiff(x, d) # Fractional differences
postpad(x, n) # pad \code{x} with zeros at the end for a total length \code{n}
# truncates if length(x) < n
sinc(x) # sin(pi * x) / (pi * x)# MATLAB-INCOMPATIBLE UTILITIES
logseq(from, to, n = 500) # like \code{linspace} but equally spaced logarithmically
# MAINLY INTERNAL, BUT MATLAB COMPATIBLE
mkpp(x, P, d = round(NROW(P)/pp$n)) # used by \code{pchip}
## Construct a piece-wise polynomial structure from sample points x and
## coefficients P.
ppval(pp, xi) # used by \code{pchip}
## Evaluate piece-wise polynomial pp and points xi.
ncauer(Rp, Rs, n) # used by \code{ellip}
ellipke(m, Nmax) # used by \code{ellip}
cheb(n, x) # nth-order Chebyshev polynomial calculated at x
# used by \code{chebwin}