Exponential Basis Function Values
expon
Language Reference for FDA Library

Exponential Basis Function Values

DESCRIPTION:

Evaluates a set of exponential basis functions, or a derivative of these functions, at a set of arguments.

USAGE:

expon(x, ratevec=1, nderiv=0)

REQUIRED ARGUMENTS:

x
a vector of values at which the basis functions are to be evaluated.

OPTIONAL ARGUMENTS:

ratevec
a vector of rate or time constants defining the exponential functions. That is, if a is the value of an element of this vector, then the corresponding basis function is exp(at). The number of basis functions is equal to the length of ratevec.
nderiv
a nonnegative integer specifying an order of derivative to be computed. The default is 0, or the basis function value.

VALUE:

a matrix of basis function values with rows corresponding to argument values and columns to basis functions.

DETAILS:

There are no restrictions on the rate constants.

SEE ALSO:

exponpen