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 _______________________________________________ R-packages mailing list R-packages at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-packages
new package: ResistorArray
1 message · robin hankin