# Search Engine

## Search

You can search for keywords, function and data names, concepts and within help page titles. The first search of a session will be slower.

Usage: Enter a string in the text field below and click the Search button or hit `RETURN`.

Fields: Topics Titles Concepts Keywords

Options: Ignore case Fuzzy match

Types: Help pages Vignettes Demos

## Concepts

Browse concepts available for searching the help system

## Keywords

Browse keywords available for searching the help system

### Keywords by Topic

Basics
  - attribute: Data Attributes
  - chron: Dates and Times
  - classes: Data Types (not OO)
  - NA: Missing Values
  - category: Categorical Data
  - character: Character Data ("String") Operations
  - complex: Complex Numbers
  - data: Environments, Scoping, Packages
  - datasets: Datasets available by data()
  - list: Lists
  - manip: Data Manipulation
  - package: Package Summaries
  - sysdata: Basic System Variables
Graphics
  - aplot: Add to Existing Plot / internal plot
  - color: Color, Palettes etc
  - device: Graphical Devices
  - dplot: Computations Related to Plotting
  - dynamic: Dynamic Graphics
  - hplot: High-Level Plots
  - iplot: Interacting with Plots
MASS (the book) uses
  - classif: Classification
  - neural: Neural Networks
  - spatial: Spatial Statistics
Mathematics
  - arith: Basic Arithmetic and Sorting
  - array: Matrices and Arrays
  - algebra: Linear Algebra
  - graphs: Graphs (not graphics), i.e nodes & edges, e.g. dendrograms
  - logic: Logical Operators
  - math: Mathematical Calculus etc
  - optimize: Optimization
  - symbolmath: "Symbolic Math", as polynomials, fractions
Programming, Input/Ouput, and Miscellaneous
  - IO: Input/output
  - connection: Input/Output Connections
  - database: Interfaces to databases
  - file: Input/Output Files
  - debugging: Debugging Tools
  - documentation: Documentation
  - environment: Session Environment
  - error: Error Handling
  - internal: Internal Objects (not part of API)
  - iteration: Looping and Iteration
  - methods: Methods and Generic Functions
  - misc: Miscellaneous
  - print: Printing
  - programming: Programming
  - interface: Interfaces to Other Languages
  - utilities: Utilities
Statistics
  - cluster: Clustering
  - datagen: Functions for generating data sets
  - design: Designed Experiments
  - distribution: Probability Distributions and Random Numbers
  - htest: Statistical Inference
  - models: Statistical Models
  - regression: Regression
  - nonlinear: Non-linear Regression
  - multivariate: Multivariate Techniques
  - nonparametric: Nonparametric Statistics
  - robust: Robust/Resistant Techniques
  - smooth: Curve (and Surface) Smoothing
  - loess: Loess Objects
  - survey: Complex survey samples
  - survival: Survival Analysis
  - tree: Regression and Classification Trees
  - ts: Time Series
  - univar: simple univariate statistics