[R] [R-pkgs] new package: ResistorArray

From: Robin Hankin <r.hankin_at_soc.soton.ac.uk>
Date: Thu 03 Mar 2005 - 20:31:16 EST


Announcing the release of a new R package ResistorArray.

This package solves the (nontrivial) general problem of resistance on arbitrary (finite)
resistor arrays.

Outside electrical engineering, the problem has a wide range of applications to
situations such as groundwater modelling; there is a direct correspondence
between electrical networks and random walks.

The package has a reasonably complete set of literature references, and solves a number
of classical problems such as the resistance between opposite points of a skeleton resistor
cube, and the Wheatstone bridge.

The package comes with a variety of standard resistor arrays, including all five platonic
solids, the Fibonacci ladder, and "N" arbitrary resistors in series.

The package gives nice numerical illustrations of a few theoretical results from the
recent (2004) literature.

One of the Google aptitude tests was to determine the electrical resistance between two points
on an infinite grid of resistors. I couldn't solve this problem analytically (although I found the
other day that a solution does exist); ResistorArray gets the answer correct to within about 1%.

--
Robin Hankin
Uncertainty Analyst
Southampton Oceanography Centre
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743

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Received on Thu Mar 03 22:10:13 2005

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