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マンデルブロ集合（Mathematica） http://blog.unfindable.net/archives/3512
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| Clear@f; | |
| f[c_] := f[c, 0., 0] | |
| f[_, _, 100] = -1; | |
| f[c_, z_, i_] := With[{x = z^2 + c}, If[2 < Abs@x, i, f[c, x, i + 1]]] | |
| xMin = -2; | |
| xMax = 1; | |
| yMin = -3/2; | |
| yMax = 3/2; | |
| dx = (xMax - xMin)/300; | |
| dy = (yMax - yMin)/300; | |
| time0 = AbsoluteTiming[ | |
| result = Table[f[x + y I], {y, yMin, yMax, dy}, {x, xMin, xMax, dx}];][[1]]; | |
| Print@time0; | |
| ArrayPlot[result] |
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