Thank you! On Tuesday, October 6, 2020 at 8:31:47 PM UTC-4 Wolfgang Bangerth wrote:
> On 10/6/20 5:50 PM, Nikki Holtzer wrote: > > > > I am trying to form a cross product/ outer product of two vectors of > type > > deallii:Vector<double>. I have attempted to use some of the built in > functions > > for the outer product from the Tensor Class but have had no luck. I > can't seem > > to get anything other than > > > > error: no matching function for call to 'outer_product(vec1, vec2);' > > > > I have tried recasting my vec1/vec2 as Tensors but have run into a > similar > > error message. > > > > Is there a built in vector cross product? Alternatively, how could I > recast my > > vectors and then use the built in functions from the Tensor Class and > finally > > recast them back into vectors? > > The easy way is to do > > const unsigned int n = vec.size(); > FullMatrix<double> o_p (n,n); > for (unsigned int i=0; i<n; ++i) > for (unsigned int j=0; j<n; ++j) > o_p(i,j) = vec[i] * vec[j]; > > But the issue is that generally you end up with a full matrix this way. Is > that what you want? How large are your vectors? > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > www: http://www.math.colostate.edu/~bangerth/ > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/a7420864-4151-43ba-b3f5-0ef23a12c371n%40googlegroups.com.
