\fBMPI_Group_excl\fP \- Produces a group by reordering an existing group and taking only unlisted members.
.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Group_excl(MPI_Group \fIgroup\fP, int\fI n\fP, int\fI *ranks\fP,
MPI_Group\fI *newgroup\fP)
.SH Fortran Syntax
.nf
INCLUDE 'mpif.h'
MPI_GROUP_EXCL(\fIGROUP, N, RANKS, NEWGROUP, IERROR\fP)
INTEGER \fIGROUP, N, RANKS(*), NEWGROUP, IERROR\fP
.SH C++ Syntax
.nf
#include <mpi.h>
Group Group::Excl(int \fIn\fP, const int \fIranks\fP[]) const
.SH INPUT PARAMETERS
.ft R
.TP 1i
group
Group (handle).
.TP 1i
n
Number of elements in array ranks (integer).
.TP 1i
ranks
Array of integer ranks in group not to appear in newgroup.
.SH OUTPUT PARAMETERS
.ft R
.TP 1i
newgroup
New group derived from above, preserving the order defined by group (handle).
.ft R
.TP 1i
IERROR
Fortran only: Error status (integer).
.SH DESCRIPTION
.ft R
The function MPI_Group_excl creates a group of processes newgroup that is obtained by deleting from group those processes with ranks ranks[0], \&... ranks[n-1]. The ordering of processes in newgroup is identical to the ordering in group. Each of the n elements of ranks must be a valid rank in group and all elements must be distinct; otherwise, the call is erroneous. If n = 0, then newgroup is identical to group.
.SH NOTE
.ft R
Currently, each of the ranks to exclude must be a valid rank in the group and all elements must be distinct or the function is erroneous. This restriction is per the draft.
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
