currents: Calculates currents in an arbitrary resistor array
In ResistorArray: Electrical Properties of Resistor Networks

Description Usage Arguments Details Value Note Author(s) Examples

Calculates currents in an arbitrary resistor array

1 2	currents(L, earth.node, input.node) currents.matrix(L, earth.node, input.node)

`L`	Lagrangian conductance matrix
`earth.node`	Number of node that is earthed (that is, at a potential of zero)
`input.node`	Number of node that has current put into it (a notional one Amp)

The methods used by the two functions are different; see documentation for resistance() for further details on input args 2 and 3

Function currents() returns a three column matrix, each row of which corresponds to an edge. The first two columns show the node numbers specifying the edge, and the third shows the current flowing along it.

Function current.matrix() uses a different method to return a matrix of the same size as the conductance matrix L. Each element of the returned matrix shows the current flowing along the specified edge.

This function is essentially a simplified version of circuit().

Robin K. S. Hankin

currents(cube(),1,7)
currents.matrix(cube(),1,7)

 #check above solution: print out the currents flowing into each node:
 zapsmall(apply(currents.matrix(cube(),1,7),1,sum))