The image below was found on http://nbviewer.ipython.org/url/jdj.mit.edu/~stevenj/IJulia%20Preview.ipynb.
<https://lh5.googleusercontent.com/-6fpa0HE0s5U/VAvbg8j--KI/AAAAAAAAAKo/Qxu5ixfgt_M/s1600/high.png> I tried the code on my own computer but I got an unclear image compared to that. You can see my picture: <https://lh3.googleusercontent.com/-c9MBLSTSmio/VAva9e5-8II/AAAAAAAAAKg/AMXFVJS3iaA/s1600/low.png> I originally tought it was mac's(OX 10.9) problem. Then I tried windows 8.1, the resolution was still low. Can any tell me why and how to fix it? Thank you.
