Watch this Author's files
Why not use R2012B
atan2d exists in R2012B and gives 0:180 and 0:-180.
Thus to get [0:360) is two lines
The function implemented is incorrect.
The correct equation is:
Z0=-2 is a Mandelbrot number, Wiki.
The ability to zoom below 0.1 is desireable. This is where the interesting structures occur.