Changed check for phantomjs via Yihui's suggestion at wch/webshot#25 …

…(comment)

01-prereqs.Rmd

@@ -15,7 +15,7 @@ if (length(new.pkgs)) {
   install.packages(new.pkgs, repos = "http://cran.rstudio.com")
 }
 # Check that phantomjs is installed
-if(webshot:::find_phantom() == "")
+if(is.null(webshot:::find_phantom()))
   webshot::install_phantomjs()
 ```
 

90-appendix1.Rmd

@@ -2,8 +2,9 @@
 
 - What is R? What is RStudio?
 - Screenshots of RStudio frames?
+- Installing R and RStudio directions with screenshots
 - Give an introduction into using R
-- Mean, median, standard deviation, five-number summary
+- Mean, median, standard deviation, five-number summary, distribution
 - Some content to cover:
     + data structures (vectors, lists, data frames, matrices)
     + indexing/subsetting

_book/appendix1.html

@@ -186,8 +186,9 @@ <h1><span class="header-section-number">7</span> Appendix A: R and RStudio Basic
 <ul>
 <li>What is R? What is RStudio?</li>
 <li>Screenshots of RStudio frames?</li>
+<li>Installing R and RStudio directions with screenshots</li>
 <li>Give an introduction into using R</li>
-<li>Mean, median, standard deviation, five-number summary</li>
+<li>Mean, median, standard deviation, five-number summary, distribution</li>
 <li>Some content to cover:
 <ul>
 <li>data structures (vectors, lists, data frames, matrices)</li>

_book/ismay_kim.tex

@@ -213,7 +213,7 @@ \chapter{Prerequisites}\label{prereqs}
   \KeywordTok{install.packages}\NormalTok{(new.pkgs, }\DataTypeTok{repos =} \StringTok{"http://cran.rstudio.com"}\NormalTok{)}
 \NormalTok{\}}
 \CommentTok{# Check that phantomjs is installed}
-\NormalTok{if(webshot:::}\KeywordTok{find_phantom}\NormalTok{() ==}\StringTok{ ""}\NormalTok{)}
+\NormalTok{if(}\KeywordTok{is.null}\NormalTok{(webshot:::}\KeywordTok{find_phantom}\NormalTok{()))}
   \NormalTok{webshot::}\KeywordTok{install_phantomjs}\NormalTok{()}
 \end{Highlighting}
 \end{Shaded}
@@ -240,7 +240,7 @@ \section{Colophon}\label{colophon}
 ##  ui       X11                         
 ##  language (EN)                        
 ##  collate  en_US.UTF-8                 
-##  tz       America/Detroit             
+##  tz       America/Chicago             
 ##  date     2016-07-31
 \end{verbatim}
 
@@ -1017,7 +1017,7 @@ \section{What's to come?}\label{whats-to-come}
 \textbf{Last updated:}
 
 \begin{verbatim}
-## [1] "Sunday, July 31, 2016 01:00:40 EDT"
+## [1] "Sunday, July 31, 2016 16:12:58 CDT"
 \end{verbatim}
 
 \chapter{Visualizing Data}\label{viz}
@@ -2202,7 +2202,7 @@ \section{What's to come?}\label{whats-to-come-1}
 \textbf{Last updated:}
 
 \begin{verbatim}
-## [1] "Sunday, July 31, 2016 01:01:28 EDT"
+## [1] "Sunday, July 31, 2016 16:13:41 CDT"
 \end{verbatim}
 
 \chapter{Manipulating Data}\label{manip}
@@ -2259,10 +2259,12 @@ \chapter{Appendix A: R and RStudio Basics}\label{appendix1}
   What is R? What is RStudio?
 \item
   Screenshots of RStudio frames?
+\item
+  Installing R and RStudio directions with screenshots
 \item
   Give an introduction into using R
 \item
-  Mean, median, standard deviation, five-number summary
+  Mean, median, standard deviation, five-number summary, distribution
 \item
   Some content to cover:
 

_book/prereqs.html

@@ -200,7 +200,7 @@ <h1><span class="header-section-number">1</span> Prerequisites</h1>
   <span class="kw">install.packages</span>(new.pkgs, <span class="dt">repos =</span> <span class="st">&quot;http://cran.rstudio.com&quot;</span>)
 }
 <span class="co"># Check that phantomjs is installed</span>
-if(webshot:::<span class="kw">find_phantom</span>() ==<span class="st"> &quot;&quot;</span>)
+if(<span class="kw">is.null</span>(webshot:::<span class="kw">find_phantom</span>()))
   webshot::<span class="kw">install_phantomjs</span>()</code></pre></div>
 <!--
 The `printr` package is useful for outputting help files directly into our book and also looking at R output in a clean way.  We, thus, need to load the packages via the `library` function:
@@ -221,7 +221,7 @@ <h2><span class="header-section-number">1.1</span> Colophon</h2>
 ##  ui       X11                         
 ##  language (EN)                        
 ##  collate  en_US.UTF-8                 
-##  tz       America/Detroit             
+##  tz       America/Chicago             
 ##  date     2016-07-31</code></pre>
 <pre><code>## Packages ---------------------------------------------------------------</code></pre>
 <pre><code>##  package      * version  date       source        

_book/tidy.html

@@ -596,7 +596,7 @@ <h2><span class="header-section-number">3.4</span> Normal forms of data</h2>
 <h2><span class="header-section-number">3.5</span> What’s to come?</h2>
 <p>In Chapter <a href="viz.html#viz">4</a>, we will further explore the distribution of a variable in a related dataset to <code>flights</code>: the <code>temp</code> variable in the <code>weather</code> dataset. We’ll be interested in understanding how this variable varies in relation to the values of other variables in the dataset. We will see that visualization is often a powerful tool in helping us see what is going on in a dataset. It will be a useful way to expand on the <code>str</code> function we have seen here for tidy data.</p>
 <p><strong>Last updated:</strong></p>
-<pre><code>## [1] &quot;Sunday, July 31, 2016 01:00:02 EDT&quot;</code></pre>
+<pre><code>## [1] &quot;Sunday, July 31, 2016 16:12:20 CDT&quot;</code></pre>
 
 </div>
 </div>