On 30 December 2012 20:21, arun <smartpink...@yahoo.com> wrote: > HI, > I was not aware of the algebraic relationship. > Tx for the explanation.
For the record; the simple example I have shown can be reproduced with Einstein's summation rule as well. While A and x tensors have covariant (lower) indices *only*. So using %r% may make sense only if we have contravariant (upper) indices as well (mixed-variant). Just to clarify my previous post to avoid any confusion. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
