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Mandelbrot set fractal generator

Description
How it works

This fun tool generates images of the Mandelbrot set. This tool works by changing the format of the cells, and not the contents.

Download

.xls file (142 KB) or .zip file (21 KB)

How to use

Key in the x and y co-ordinates of the center of the image and the span of the image. Key in the number of iterations required and then click generate image to get the image of the fractal.

Choosing a larger number of iterations will usually result in a sharper plot but it could take longer.

Sample images

The following couple of images were obtained by running 1000 iterations. The first has a center at (0,0) and span of 4 while the  center of the second at (-1,0) and span of 2.

Mandelbrot1

Mandelbrot2

The following couple of images were generated after 10,000 iterations. The first has a center at
(-1.625,0), span 0.05, the second has its center at ( -1.6755475,0) and span 0.000005.

Mandelbrot

Mandelbrot