3.3. Installing and Running PopRatio
3.3.1. Setting the accuracy of floating point operations
The user must set the accuracy of the floating point calculations by editing the WP kind parameter in module PRECISION (see section 3.1.1).
There are only two options available, corresponding to the single/double precision Fortran 77's data types. This restriction applies because PopRatio uses F77 routines from the BLAS, LAPACK and PPPACK libraries. The Fortran 90 interfaces to these routines will automatically call the correct routines suitable to the selected precision.
The default precision is set to correspond to the double precision Fortran 77 data type.