sumising | R Documentation |
This function implements a path sampling approximation of the normalising constant of an Ising model with a four neighbour relation.
sumising(niter = 10^3, numb, beta)
niter |
number of iterations |
numb |
size of the square grid for the Ising model |
beta |
Ising model parameter |
returns a vector of 21 values for Z(β) corresponding to a regular sequence of beta's between 0 and 2
isingibbs
,isinghm
Z=seq(0,2,length=21) for (i in 1:21) Z[i]=sumising(5,numb=24,beta=Z[i]) lrcst=approxfun(seq(0,2,length=21),Z) plot(seq(0,2,length=21),Z,xlab="",ylab="") curve(lrcst,0,2,add=TRUE)
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