Dirichlet Eta Function
Dirichlet's eta function valid in the entire complex plane.
eta(z)
z |
Real or complex number or a numeric or complex vector. |
Computes the eta function for complex arguments using a series expansion.
Accuracy is about 13 significant digits for abs(z)<100,
drops off with higher absolute values.
Returns a complex vector of function values.
Copyright (c) 2001 Paul Godfrey for a Matlab version available on Mathwork's Matlab Central under BSD license.
Zhang, Sh., and J. Jin (1996). Computation of Special Functions. Wiley-Interscience, New York.
z <- 0.5 + (1:5)*1i eta(z) z <- c(0, 0.5+1i, 1, 1i, 2+2i, -1, -2, -1-1i) eta(z)
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