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# mandelbrot_vectorized.R | |
# Myles Harrison | |
# http://www.everydayanalytics.ca | |
# parameters | |
cols <- colorRampPalette(c("blue","yellow","red","black"))(11) | |
xmin = -2 | |
xmax = 2 | |
nx = 500 | |
ymin = -1.5 | |
ymax = 1.5 | |
ny = 500 | |
n=200 | |
# variables | |
x <- seq(xmin, xmax, length.out=nx) | |
y <- seq(ymin, ymax, length.out=ny) | |
c <- outer(x,y*1i,FUN="+") | |
z <- matrix(0.0, nrow=length(x), ncol=length(y)) | |
k <- matrix(0.0, nrow=length(x), ncol=length(y)) | |
for (rep in 1:n) { | |
print(rep) | |
index <- which(Mod(z) < 2) | |
z[index] <- z[index]^2 + c[index] | |
k[index] <- k[index] + 1 | |
} | |
image(x,y,k, col=cols) |
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