# Expokit in R

### Description

R-interface to the Fortran package Expokit for matrix exponentiation.

### Details

Package: | expoRkit |

Type: | Package |

Version: | 0.9 |

Date: | 2012-10-08 |

License: | GPL (>= 2) |

LazyLoad: | yes |

Expokit is an efficient Fortran implementation for computing the matrix exponential, or rather, its action on a vector, for large sparse matrices. This can also be understood as computing the solution of a system of linear ordinary first order differential equations. This package provides an R-interface to some of the Fortran subroutines from Expokit.

The Fortran package was developed by Roger B. Sidje, see http://www.maths.uq.edu.au/expokit/. Niels Richard Hansen adapted the package for use with R and wrote the R interface. Permission to distribute the Expokit source under GPL was obtained from Roger B. Sidje.

### Author(s)

Roger B. Sidje roger.b.sidje@ua.edu, Niels Richard Hansen Niels.R.Hansen@math.ku.dk.

### References

Sidje, R. B. (1998) Expokit. Software Package for Computing Matrix Exponentials. ACM Trans. Math. Softw. 24(1), 130-156.

### See Also

`expv`