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I've wrote some code to simulate a random walk in 2 dimensions on a lattice. Basically I want to add something in to make it plot it point by point so you can see what is going on. Heres my code for the random walk in 2d RW2D<-function(N) { i<-0 xdir<-0 ydir<-0 xpos<-vector() xpos[1]<-xdir ypos<-vector() ypos[1]<-ydir for (i in 1:N-1) { r<-runif(1) if(r<=0.25) {xdir<-xdir+1} if(r>0.25 && r<=0.5) {xdir<-xdir-1} if(r>0.5 && r<=0.75) {ydir<-ydir +1} if(r>0.75) {ydi...