Xiangdong <epsco...@gmail.com> writes: > Hello everyone, > > I have a questions about vectors in an DMDA with DOF>1. For example, in 1d > with number of grid N and DOF=2 (two fields u and v), the length of the > global vector is 2*N. > > What is the best way to restrict this vector (length 2*N) to a vector > (length N) corresponding to the field u only? This will help me obtain the > properties of field u by using VecSum and other vec functions.
http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Vec/VecStrideGather.html
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