logt
Logarithm by tau approximation for itau object.
Syntax
[F, e, n] = logt(x)
Description
F = logt(x) is a function to approximate by tau method log(x), x in
[a, b]. This function goal is to take the machine precision in this
approximation, once logt(x) can be a funcional coeefficient at the
equation. For this porpouse, we are ulogg schursolver function, which
will decide the approximation degree to achieve 1e-16. Concluding, now
is possible to use logt(x) as coefficient.
Input
x = independent tau variable (itau object).
Output
F = polynomial approximation of log(x) in [a, b] evaluated (with
orthovalM) in argument M = matrixM(x) (double matrix).
See also
sint, sinht, cost, cosht, and expt.
F = logt(x) is a function to approximate by tau method log(x), x in [a, b]. This function goal is to take the machine precision in this approximation, once logt(x) can be a funcional coeefficient at the equation. For this porpouse, we are ulogg schursolver function, which will decide the approximation degree to achieve 1e-16. Concluding, now is possible to use logt(x) as coefficient.
Input
x = independent tau variable (itau object).
Output
F = polynomial approximation of log(x) in [a, b] evaluated (with
orthovalM) in argument M = matrixM(x) (double matrix).
See also
sint, sinht, cost, cosht, and expt.
F = polynomial approximation of log(x) in [a, b] evaluated (with
orthovalM) in argument M = matrixM(x) (double matrix).