Working on my 'Bessel' package, I've re-detected today, that

indeed even C99 standard GLIBC does not contain, a complex

number version of

log1p()

Further missing in current R, are, basically these

> z <- 1 + 2i

> log1p(z)

Error in log1p(z) : unimplemented complex function

> expm1(z)

Error in expm1(z) : unimplemented complex function

> gamma(z)

Error in gamma(z) : unimplemented complex function

> lgamma(z)

Error in lgamma(z) : unimplemented complex function

> psigamma(z)

Error in psigamma(z) : unimplemented complex function

> digamma(z)

Error in digamma(z) : unimplemented complex function

> sinpi(z)

Error in sinpi(z) : unimplemented complex function

> cospi(z)

Error in cospi(z) : unimplemented complex function

> floor(z)

Error in floor(z) : unimplemented complex function

> ceiling(z)

Error in ceiling(z) : unimplemented complex function

>

--------------

Is anyone aware of Free Software implementations of these,

ideally in C ?

... yes, I think I've found the Julia source code for these,

nicely written in Julia itself...

Martin

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