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install.packages("devtools") # windows users install Rtools. Also: for mac and linux.
library("devtools")
install_github("ropensci/plotly")  # Plotly is part of the super cool rOpenSci.

library(plotly)  # install libraries we’ll be using
library(ggplot2)
library(reshape)

py <- plotly("ggplot2examples", "3gazttckd7")  # sign up (https://plot.ly/ssi/) and get a key  or use our public key to initiate a graph object

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</p><a href="https://plot.ly">Plotly</a> lets you collaboratively analyze data and make beautiful, web-based plots. Add <code>py$ggplotly()</code> to the end of your ggplot2 script, and you get an interactive, embeddable, shareable graph like the one below (credit: from <a href="http://nbviewer.ipython.org/gist/mkcor/0ee7c73d9ba4c68ddc1a/">a Notebook</a> presented at useR by <a href="https://marianne-corvellec.appspot.com/">Marianne Corvellec</a>). It's that easy.</p>
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<iframe width="800" height="550" frameborder="0" seamless="seamless" scrolling="no" src="https://plot.ly/~ggplot2examples/208/.embed?width=800&height=550"></iframe>
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<br>
<p>The overview:
<UL>
<li type=disc> You can use <a href="https://plot.ly/ggplot2/">ggplot2 and Plotly</a> to make bar, line, and scatter charts, plus histograms and facets. 

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<p>You can embed interactive Plotly graphs in your webpage or blog with this HTML snippet. Add the desired URL and re-size as needed.</p>
<br>
<pre style="background:#f1f1f1;color:#000">&lt;iframe src=<span style="color:#c03030">"https://plot.ly/~cimar/114/650/650"</span> width=<span style="color:#c03030">"650"</span> height=<span style="color:#c03030">"650"</span> frameBorder=<span style="color:#c03030">"0"</span> seamless=<span style="color:#c03030">"seamless"</span> scrolling=<span style="color:#c03030">"no"</span>&gt;&lt;/iframe>
</span></pre>
<div width="100%" align="center"><p>***</p></div>
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<img src="https://31.media.tumblr.com/8b02b31fc6bdf3b17b24fee080dec36e/tumblr_inline_n9eb6jUByn1suclhk.png">
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<br>

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How do people use Plotly? Google Chrome ships a Plotly <a href="https://chrome.google.com/webstore/detail/plotly/hfjjbcodmdgnpngccdnefheadifbmmei">Chrome App</a> for high schoolers and businesses. NASA scientists and engineers track satellites with Plotly. Journalists at the Washington Post and Wired explain current events with Plotly. How can you use Plotly? Read on to learn more about our free online product or see a <a href="https://plot.ly/product/enterprise/">product page</a> to learn about how to run Plotly on your own servers.
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Let's jump in. A Plotly version of a <a href="https://www.facebook.com/notes/facebook-data-science/mothers-day-2014/10152235539518859">Facebook Data Science team</a> graph shows the age of children on the x axis and the distance between children and mothers on the y axis. 
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<iframe width="650" height="650" frameborder="0" seamless="seamless" scrolling="no" src="https://plot.ly/~cimar/38/.embed?width=650&height=650"></iframe>
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Move your mouse over the g