And VecStrideNorm(), VecStrideScale(), VecStrideNormAll() etc. Let us know what is missing and what you need?
Barry On May 25, 2014, at 7:40 PM, Jed Brown <[email protected]> wrote: > Xiangdong <[email protected]> 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
