rdpeng/ExData_Plotting1 — pull request #157 by mm77548 (2014-12-06 04:17:51+00:00)
Title: Create plot1.R

![plot1](https://cloud.githubusercontent.com/assets/8694694/5326142/e81e96a8-7cd4-11e4-9aea-21b17b3d05e7.png)