Support Lazy evaluation in `RKeOps`

AmelieVernay commented 3 years ago

Contributors: @chloesrcb and @AmelieVernay

Description: Add LazyTensors in RKeOps, with reductions and symbolic operations.

Summary

add LazyTensor and ComplexLazyTensor classes;
symbolic operations from doc;
reduction operation from doc;
documentation for every function;
unit test for every function (all passing);
vignette that explains R LazyTensors;
vignette with example of conjugate gradient method for kriging;
benchmark with time comparison between standard R computation and RKeOps with and without LazyTensors.

Things to improve

remove warning message for complex/not complex binary operations when issue #187 will be fixed;
remove warning message for LogSumExp reduction with weights when issue #191 will be fixed;
complete unit tests for LogSumExp et SumSoftMaxWeight;
the 2D plot in the vignette on kernel interpolation is made with plotly, but if needed, there is a ggplot code in dev/kernel_interpolation.R that gives almost the same result;
remove devtools::load_all("..") in the vignettes when updates will be on the CRAN ?

gdurif commented 2 years ago

Waiting on #231 before reviving and merging this

gdurif commented 1 year ago

Note: lint fails for some debug code not included in the package.

gdurif commented 1 year ago

Note: for remaining TODOs (-> new PR), see rkeops/TODOs.md

getkeops / keops