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Undefined subroutine &Math::Complex::cplx

Undefined subroutine &Math::Complex::cplx

by Andras Balogh -
Number of replies: 0
I am trying to use R to calculate eigenvalues (possibly for matrices of sizes 5x5 or 6x6 as computational exercise).

It works fine for a 3x3 matrix with real eigenvalues:

But not for a 3x3 matrix with complex eigenvalues:
rserve_eval("eigsys=eigen(matrix(c(-1,-1,6, -7,8,8, 3,-5,4),nrow=3,ncol=3))");

I get the error message
Undefined subroutine &Math::Complex::cplx called at /usr/local/share/perl5/Statistics/R/IO/QapEncoding.pm line 323

The required perl module seems to be installed:
perl -MCPAN -e "install Math::Complex"
CPAN: Storable loaded ok (v2.51)
Reading '/root/.cpan/Metadata'
Database was generated on Mon, 13 Nov 2017 22:17:02 GMT
CPAN: Module::CoreList loaded ok (v5.20151220)
Math::Complex is up to date (1.59).

and I loaded a bunch of macros already:

What am I missing?