Cookbook for R
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Shapes and line types
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2026-10-24 11:06:05
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Introduction
Basics
Installing and using packages
Indexing into a data structure
Getting a subset of a data structure
Making a vector filled with values
Information about variables
Working with NULL, NA, and NaN
Numbers
Generating random numbers
Generating repeatable sequences of random numbers
Saving the state of the random number generator
Rounding numbers
Comparing floating point numbers
Strings
Creating strings from variables
Formulas
Creating a formula from a string
Extracting components from a formula
Data input and output
Loading data from a file
Loading and storing data with the keyboard and clipboard
Running a script
Writing data to a file
Writing text and output from analyses to a file
Manipulating data
General
Sorting
Randomizing order
Converting between vector types
Finding and removing duplicate records
Comparing vectors or factors with NA
Recoding data
Mapping vector values
Factors
Renaming levels of a factor
Re-computing the levels of factor
Changing the order of levels of a factor
Data Frames
Renaming columns in a data frame
Adding and removing columns from a data frame
Reordering the columns in a data frame
Merging data frames
Comparing data frames
Re-computing the levels of all factor columns in a data frame
Restructuring data
Converting data between wide and long format
Summarizing data
Converting between data frames and contingency tables
Sequential data
Calculating a moving average
Averaging a sequence in blocks
Finding sequences of identical values
Filling in NAs with last non-NA value
Statistical analysis
Regression and correlation
t-test
Frequency tests
ANOVA
Logistic regression
Homogeneity of variance
Inter-rater reliability
Graphs
Graphs with ggplot2
Bar and line graphs (ggplot2)
Plotting means and error bars (ggplot2)
Plotting distributions (ggplot2)
Scatterplots (ggplot2)
Titles (ggplot2)
Axes (ggplot2)
Legends (ggplot2)
Lines (ggplot2)
Facets (ggplot2)
Multiple graphs on one page (ggplot2)
Colors (ggplot2)
Miscellaneous
Output to a file
Shapes and line types
Fonts
Basic graphs with standard graphics
Histogram and density plot
Scatterplot
Box plot
Q-Q plot
Other interesting graphs
Correlation matrix
Scripts and functions
Debugging a script or function
Measuring elapsed time
Getting a list of functions and objects in a package
Tools for experiments
Generating counterbalanced orders
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