library(caTools) # external package providing write.gif functionjet.colors <- colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan", "#7FFF7F",
"yellow", "#FF7F00", "red", "#7F0000"))
m <- 1200 # define sizeC <- complex( real=rep(seq(-1.8,0.6, length.out=m), each=m ),
imag=rep(seq(-1.2,1.2, length.out=m), m ) )
C <- matrix(C,m,m) # reshape as square matrix of complex numbersZ <- 0 # initialize Z to zeroX <- array(0, c(m,m,20)) # initialize output 3D arrayfor (k in 1:20) { # loop with 20 iterations
Z <- Z^2+C # the central difference equation X[,,k] <- exp(-abs(Z)) # capture results
} write.gif(X, "Mandelbrot.gif", col=jet.colors, delay=100)