Input :
- str : String like 'ik,kj-> ij'
- varargin : Double called
Output :
- Out : Double
Usage : Matrix multiplication C = A*B A(ik)*B(kj) = C(ij) -> C=einsum('ik,kj->ij',A,B)
Limitations :
- Works on 2016b and later
- Take only "diagonal terms" for an nd-array isn't permitted ex : 'iij,jk -> ik'