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.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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