r8lib, a FORTRAN90 code which contains a number of utility routines for "R8" or "double precision real" arithmetic.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
r8lib is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and an Octave version and a Python version and an R version.
C8LIB, a FORTRAN90 code which implements certain elementary functions for "C8" or double precision complex variables;
I4LIB, a FORTRAN90 code which contains many utility routines, using "I4" or "single precision integer" arithmetic.
I8LIB, a FORTRAN90 code which contains many utility routines, using "I8" or "double precision integer" arithmetic.
R8COL, a FORTRAN90 code which contains utility routines for R8COL's, that is, double precision real MxN arrays, considered as N column vectors, each of length M. The data may be thought of as a matrix of multiple columns, and many operations will be carried out columnwise.
R8ROW, a FORTRAN90 code which contains utility routines for R8ROW's, that is, double precision real MxN arrays, considered as M row vectors, each of length N. The data may be thought of as a matrix of multiple rows, and many operations will be carried out rowwise.