slabasan.github.io/R_tips.html at master · slabasan/slabasan.github.io · GitHub

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<html>

<head>
  <title>Stephanie Brink</title>	<!--title of tab-->
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<body>
  <div id="top">
  <h1 id="name">R Tips</h1>
  <hr>
  </div>

  <br>

  <div id="table">
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        <td>
			<div id="research">

            <p id="header">Table of Contents</p>
			<ul>
				<li><a href="R_tips.html#downloads">Downloads</a></li>
				<li><a href="R_tips.html#nav">Navigation</a></li>
				<li><a href="R_tips.html#dataframe">Data Frames</a></li>
				<li><a href="R_tips.html#plots">Plots</a></li>
				<li><a href="R_tips.html#standards">Code Standards</a></li>
				<li><a href="R_tips.html#resources">Other Resources</a></li>
			</ul>

            <a name="downloads"><p id="header">Downloads</p></a>
			<ul>
				<li><a href="https://www.rstudio.com/products/rstudio/download/">RStudio</a></li>
				<li><a href="https://cran.r-project.org/mirrors.html">R Package</a></li>
			</ul>

            <a name="nav"><p id="header">Naviation</p></a>
			<ul>
				<li>ls(): List known variables and functions definitions.</li>
				<li>getwd(): Return current working directory.</li>
				<li>setwd("path"): Change current working directory to
				specified path enclosed by quotes.</li>
				<li>?cmd: Access man pages for built-in R functions and
				commands.</li>
			</ul>

            <a name="dataframes"><p id="header">Data Frames</p></a>
			<ul>
				<li><u>Create from file</u>:
				<ul>
					<li>read.table()</li>
					<li>read.csv()</li>
				</ul>
				<li><u>Manipulate</u>:
				<ul>
					<li>Double vs Single Brackets</li>
					<li>which()</li>
					<li>match()</li>
					<li>for (i in 1:10) {}</li>
				</ul>
				</li>
			</ul>

            <a name="plots"><p id="header">Plots</p></a>
			<ul>
				<li><u>Formatting</u>:
				<ul>
					<li>cex.main: Increase font size of chart title. Default is
					1.</li>
					<li>cex.axis: Increase font size of axes tick lables.
					Default is 1.</li>
					<li>cex.lab: Increase font size of axes labels. Default is
					1.</li>
					<li>mar: Set margin size with a vector of length 4. First
					value specifies bottom margin, and move clockwise (to the
					left). Default setting is c(4.1, 5.1, 5.1, 2.1), which can
					be checked with par("mar").</li>
					<li>oma</li>
					<li>mfrow: Enable multiple plots in the same window with a
					vector of the form c(nrows,ncols). Default is c(1,1).</li>
					<li>xpd: Enable plotting outside plot region, useful for
					when you want to put the legend outside the bounded box.
					Can toggle between TRUE and FALSE when you wish. Default
					value is FALSE, so all plots are restricted to plot region.
				</ul>
				<li><u>Legend</u>:
				<ul>
					<li>legend()</li>
					<li>bty: Toggle outline of legend on ("y") and off ("n").
					Default is on.</li>
					<li>ncol: Force horizontal legend by specifying number of
					desired columns. Default number of columns is 1.</li>
					<li>cex: Increase font size.</li>
					<li>title: Add a title to the top of the legend.</li>
				</ul>
				</li>
			</ul>

            <a name="standards"><p id="header">Programming Common Pratices</p></a>
			<ul>
				<li><a href="https://google.github.io/styleguide/Rguide.xml">Google's R Style Guide</a></li>
			</ul>

            <a name="resources"><p id="header">R Resources</p></a>
			<ul>
				<li><a href="https://www.r-project.org">R Home Page</a></li>
				<li><a href="https://www.rstudio.com">R GUI Interface</a></li>
				<li><a href="https://www.coursera.org/learn/r-programming/">Free Intro to R Course</a></li>
				<li><a href="http://www.r-graph-gallery.com">See Ideas for Graphs</a></li>
				<li><a href="http://r4ds.had.co.nz/">R for Data Science eBook</a></li>
				<li><a href="http://www.studytrails.com/r/15-page-tutorial-for-r/">R Tutorials</a></li>
			</ul>

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