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<!DOCTYPE html><html lang="en"><head><title>R: Search Engine</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"><link rel="stylesheet" type="text/css" href="R.css"></head><body><div class="container"><h1>Search Engine <img class="toplogo" src="Rlogo.svg" alt="[R logo]"></h1><div style="text-align: center;"><a href="index.html"><img class="arrow" src="up.jpg" alt="[Top]"></a></div><hr style="width: 100%;"><h2>Search</h2><p>You can search for keywords, function and data names, concepts andwithin help page titles. The first search of a session will be slower.</p><p><b>Usage:</b> Enter a string in the text field below and click theSearch button or hit<code>RETURN</code>.</p><form name="f" action="Search" method = "get"><input type="text" name="pattern" size="20" maxlength="256" value=""><p>Fields:<input name="fields.alias" type="checkbox" checked value="1">Topics<input name="fields.title" type="checkbox" checked value="1">Titles<input name="fields.concept" type="checkbox" checked value="1">Concepts<input name="fields.keyword" type="checkbox" value="1">Keywords</p><p>Options:<input name="ignore.case" type="checkbox" checked value="1">Ignore case<input name="agrep" type="checkbox" value="1"> Fuzzy match</p><p>Types:<input name="types.help" type="checkbox" checked value="1">Help pages<input name="types.vignette" type="checkbox" checked value="1">Vignettes<input name="types.demo" type="checkbox" checked value="1">Demos</p><br><input value="Search" type="submit"><input value="Reset" type="reset"></form><hr style="width: 100%;"><h2>Concepts</h2><a href="/doc/html/hsearch_db_concepts.html">Browse concepts available for searching the help system</a><h2>Keywords</h2><a href="/doc/html/hsearch_db_keywords.html">Browse keywords available for searching the help system</a><h3>Keywords by Topic</h3><dl><dt>Basics</dt><dd><ul><li><a href="Search?category=attribute">attribute</a>: Data Attributes</li><li><a href="Search?category=chron">chron</a>: Dates and Times</li><li><a href="Search?category=classes">classes</a>: Data Types (not OO)<ul><li><a href="Search?category=NA">NA</a>: Missing Values </li><li><a href="Search?category=category">category</a>: Categorical Data</li><li><a href="Search?category=character">character</a>: Character Data ("String") Operations</li><li><a href="Search?category=complex">complex</a>: Complex Numbers</li></ul></li><li><a href="Search?category=data">data</a>: Environments, Scoping, Packages</li><li><a href="Search?category=datasets">datasets</a>: Datasets available by data()</li><li><a href="Search?category=list">list</a>: Lists</li><li><a href="Search?category=manip">manip</a>: Data Manipulation</li><li><a href="Search?category=package">package</a>: Package Summaries</li><li><a href="Search?category=sysdata">sysdata</a>: Basic System Variables</li></ul></dd><dt>Graphics</dt><dd><ul><li><a href="Search?category=aplot">aplot</a>: Add to Existing Plot / internal plot</li><li><a href="Search?category=color">color</a>: Color, Palettes etc</li><li><a href="Search?category=device">device</a>: Graphical Devices</li><li><a href="Search?category=dplot">dplot</a>: Computations Related to Plotting</li><li><a href="Search?category=dynamic">dynamic</a>: Dynamic Graphics</li><li><a href="Search?category=hplot">hplot</a>: High-Level Plots</li><li><a href="Search?category=iplot">iplot</a>: Interacting with Plots</li></ul></dd><dt>MASS (the book) uses</dt><dd><ul><li><a href="Search?category=classif">classif</a>: Classification </li><li><a href="Search?category=neural">neural</a>: Neural Networks </li><li><a href="Search?category=spatial">spatial</a>: Spatial Statistics </li></ul></dd><dt>Mathematics</dt><dd><ul><li><a href="Search?category=arith">arith</a>: Basic Arithmetic and Sorting</li><li><a href="Search?category=array">array</a>: Matrices and Arrays<ul><li><a href="Search?category=algebra">algebra</a>: Linear Algebra</li></ul></li><li><a href="Search?category=graphs">graphs</a>: Graphs (notgraphics), i.e nodes & edges, e.g. dendrograms</li><li><a href="Search?category=logic">logic</a>: Logical Operators</li><li><a href="Search?category=math">math</a>: Mathematical Calculus etc </li><li><a href="Search?category=optimize">optimize</a>: Optimization</li><li><a href="Search?category=symbolmath">symbolmath</a>: "SymbolicMath", as polynomials, fractions</li></ul></dd><dt>Programming, Input/Ouput, and Miscellaneous</dt><dd><ul><li><a href="Search?category=IO">IO</a>: Input/output<ul><li><a href="Search?category=connection">connection</a>: Input/Output Connections</li><li><a href="Search?category=database">database</a>: Interfaces to databases</li><li><a href="Search?category=file">file</a>: Input/Output Files</li></ul></li><li><a href="Search?category=debugging">debugging</a>: Debugging Tools</li><li><a href="Search?category=documentation">documentation</a>: Documentation</li><li><a href="Search?category=environment">environment</a>: Session Environment</li><li><a href="Search?category=error">error</a>: Error Handling</li><li><a href="Search?category=internal">internal</a>: Internal Objects (not part of API)</li><li><a href="Search?category=iteration">iteration</a>: Looping and Iteration</li><li><a href="Search?category=methods">methods</a>: Methods and Generic Functions</li><li><a href="Search?category=misc">misc</a>: Miscellaneous</li><li><a href="Search?category=print">print</a>: Printing</li><li><a href="Search?category=programming">programming</a>: Programming<ul><li><a href="Search?category=interface">interface</a>: Interfaces to Other Languages</li></ul></li><li><a href="Search?category=utilities">utilities</a>: Utilities</li></ul></dd><dt>Statistics</dt><dd><ul><li><a href="Search?category=cluster">cluster</a>: Clustering</li><li><a href="Search?category=datagen">datagen</a>: Functions for generating data sets</li><li><a href="Search?category=design">design</a>: Designed Experiments</li><li><a href="Search?category=distribution">distribution</a>: Probability Distributions and Random Numbers</li><li><a href="Search?category=htest">htest</a>: Statistical Inference</li><li><a href="Search?category=models">models</a>: Statistical Models<ul><li><a href="Search?category=regression">regression</a>: Regression<ul><li><a href="Search?category=nonlinear">nonlinear</a>:Non-linear Regression </li></ul></li></ul></li><li><a href="Search?category=multivariate">multivariate</a>: Multivariate Techniques</li><li><a href="Search?category=nonparametric">nonparametric</a>: Nonparametric Statistics </li><li><a href="Search?category=robust">robust</a>: Robust/Resistant Techniques</li><li><a href="Search?category=smooth">smooth</a>: Curve (and Surface) Smoothing<ul><li><a href="Search?category=loess">loess</a>: Loess Objects</li></ul></li><li><a href="Search?category=survey">survey</a>: Complex survey samples</li><li><a href="Search?category=survival">survival</a>: Survival Analysis</li><li><a href="Search?category=tree">tree</a>: Regression and Classification Trees</li><li><a href="Search?category=ts">ts</a>: Time Series</li><li><a href="Search?category=univar">univar</a>: simple univariate statistics </li></ul></dd></dl></div></body></html>