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doBy (version 3.1)

Groupwise computations of summary statistics and other utilities

Description

Facilities for groupwise computations of summary statistics and other facilities for working with grouped data (similar to what can be achieved by proc means or proc summary of the SAS system).

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Version

Install

install.packages('doBy')

Monthly Downloads

269,505

Version

3.1

License

GPL (>= 2)

Maintainer

S�ren H�jsgaard

Last Published

June 29th, 2025

Functions in doBy (3.1)

lapplyBy

Formula based version of lapply

summaryBy

Function to calculate groupwise summary statistics

subsetBy

Finds subsets of a dataframe which is split by variables in a formula.

dietox

Growth curves of pigs in a 3x3 factorial experiment

recodevar

recode levels of variable

codstom

Diet of Atlantic cod in the Gulf of St. Lawrence (Canada)

sampleBy

Sampling from a data frame

splitBy

Split a data frame

orderBy

Ordering (sorting) rows of a data frame

transformBy

Function to make groupwise transformations

esticon

Contrasts for lm, glm, lme, and geeglm objects

dose.LD50

Calculate LD50

internal

Internal functions for the doBy package

doBy

Various utilities which includes functions for creating groupwise calculations etc.

firstlastobs

Locate the index of the first/last unique value

budworm

Effect of Insecticide on survivial of tobacco budworms