Einstein Summation

The summation notation suggested by Einstein (1916) is a concise mathematical notation that implicitly sums over repeated indices of n-dimensional arrays. Many ordinary matrix operations (e.g. transpose, matrix multiplication, scalar product, 'diag()', trace etc.) can be written using Einstein notation. The notation is particularly convenient for expressing operations on arrays with more than two dimensions because the respective operators ('tensor products') might not have a standardized name.


Reference manual

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0.1.0 by Constantin Ahlmann-Eltze, a month ago

Browse source code at https://github.com/cran/einsum

Authors: Constantin Ahlmann-Eltze [aut, cre]

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports Rcpp, glue, mathjaxr

Suggests testthat, covr

Linking to Rcpp

System requirements: C++11

See at CRAN