Oliver Kullmann <O.Kullmann <at> swansea.ac.uk> writes: > > Hello, > > I couldn't find information on whether the logarithmic integrals > > Li_m(x) = integral_0^x log(t)^(-m) dt > > for x >= 0 are available in R?
I saw your request only this weekend. The first logarithmic integral can be computed using the exponential integral Ei(x) per li(x) = Ei(log(x)) and elliptic integrals are part of the 'gsl' package, so library('gsl') x <- seq(2, 10, by=0.5) y <- expint_Ei(log(x)) y See e.g. the Handbook of Mathematical Functions for how to reduce higher logarithmic integrals. Another possibility is to use the Web API of 'keisan', the calculation library of Casio. Regards Hans Werner > Best wishes > > Oliver > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.