From cce88527cb26cbe58be81e77ca325875ddc50c81 Mon Sep 17 00:00:00 2001
From: Shivaram Venkataraman <shivaram@eecs.berkeley.edu>
Date: Mon, 3 Mar 2014 18:01:44 -0800
Subject: [PATCH] Add lab4 readme

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 lab4/README.md | 3 +++
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 create mode 100644 lab4/README.md

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+## Lab 4 for Introduction to Data Science
+
+Open the IPython notebook on [joins](http://nbviewer.ipython.org/github/amplab/datascience-sp14/blob/master/lab4/joins.ipynb) to get started !