A 'greta' extension for analysing transition matrices and 
  ordinary differential equations representing dynamical systems. Provides 
  functions for analysing transition matrices by iteration, and solving 
  ordinary differential equations. This is an extension to the 'greta' 
  software, Golding (2019) <doi:10.21105/joss.01601>.

Provides a syntax to create and combine Gaussian process kernels
  in 'greta'. You can then use these kernels to define either full rank or
  sparse Gaussian processes, and project a fitted process to new coordinates.
  This lets you include Gaussian process components in the statistical models
  you write with 'greta'. This is an extension to the 'greta' software, Golding
  (2019) <doi:10.21105/joss.01601>.

The social network literature features numerous methods for assigning
    value to paths as a function of their ties. 'gretel' systemizes these approaches,
    casting them as instances of a generalized path value function indexed by 
    a penalty parameter. The package also calculates probabilistic path value and
    identifies optimal paths in either value framework. Finally, proximity 
    matrices can be generated in these frameworks that capture high-order connections 
    overlooked in primitive adjacency sociomatrices. Novel methods are described
    in Buch (2019) <https://davidbuch.github.io/analyzing-networks-with-gretel.html>. 
    More traditional methods are also implemented, as described in Yang, Knoke (2001) 
    <doi:10.1016/S0378-8733(01)00043-0>.

It allows running 'gretl' (<http://gretl.sourceforge.net/index.html>) program from R, R Markdown and Quarto. 'gretl' ('Gnu' Regression, 'Econometrics', and Time-series Library) is a statistical software for Econometric analysis.  This package does not only integrate 'gretl' and 'R' but also serves  as a 'gretl' Knit-Engine for 'knitr' package. Write all your 'gretl' commands in 'R', R Markdown chunk.

Convert 'Ensembl' gene identifiers from Genotype-Tissue
    Expression (GTEx) data to identifiers in other annotation systems,
    including 'Entrez', 'HGNC', and 'UniProt'.