Plots

![plot1](https://cloud.githubusercontent.com/assets/7274065/3211671/7da08dde-ef28-11e3-8cea-d63f78cec3af.png)
![plot2](https://cloud.githubusercontent.com/assets/7274065/3211672/803e134a-ef28-11e3-9fa3-004cf105a031.png)
![plot3](https://cloud.githubusercontent.com/assets/7274065/3211673/816d3f8e-ef28-11e3-87a2-03f295c8571f.png)
![plot4](https://cloud.githubusercontent.com/assets/7274065/3211674/829d9a34-ef28-11e3-9242-760918fc0e1e.png)