write_TSPLIB(x, file, precision = 6, inf = NULL, neg_inf = NULL)
read_TSPLIB(file, precision = 0)TSP or ATSP.connection.x already is integer, this
argument is ignored and x is used as is.Inf (TSPLIB format cannot handle
Inf). If inf is NULL, the default value of 2 times
the maximum value in x (ignoring the infinity entries) is used.-Inf.
If no value is specified, the default value of
2 times the smalles neg. number is used.
If x only contains positive
values, -1 is used.read_TSPLIB returns an object of class TSP or ATSP.x contains double values (which is normal in R) the values given
in x are multiplied by $10^{precision}$ before coercion to
integer. Note that therefore all results produced by programs using the
TSPLIB file as input need to be divided by $10^{precision}$ (i.e., the
decimal point has to be shifted precision placed to the left).