doBy v4.7.0 (Release date: 2025-06-29)

• parseGroupFormula updated
• head2() and tail2() for matrices added
• pow() function added
• Cleanups of code

doBy v4.6.27 (Release date: 2025-05-16)

• pick1() and pick2() functions added. Short for extract with one or two brackets.
• math_teachers data dataset added.

doBy v4.6.26 (Release date: 2025-04-02)

• split_by() reworked
• Various datasets added
• add_pred(), add_resid(), reciprocal() functions added

doBy v4.6.25 (Release date: 2025-01-29)

• Various minor changes; too many to remember.

doBy v4.6.24 (Release date: 2024-10-07)

• response_plot function added.
• file with matrix operations removed.

doBy v4.6.23 (Release date: )

• income data added

doBy v4.6.22 (Release date: 2024-06-20)

• Various internal cleanups

doBy v4.6.21 (Release date: )

• crickets data added
• Added function binomial_to_bernoulli_data, model_stability_glm, plot_lm
• Functionality of split_byrow and split_bycol extended

doBy v4.6.20 (Release date: 2023-11-01)

Changes

• smaller changes to expr_to_fun (length_nparm is argument)

doBy v4.6.19 (Release date: 2023-10-02)

Changes

• Smaller changes in section_fun and related functions

doBy v4.6.18 (Release date: 2023-08-03)

Changes

• R version requirement updated to ensure that Rs native pipe is available

doBy v4.6.17 (Release date: 2023-07-10)

Changes

• bquote_fun_list removed again; too over engineered
• Minor bug fixes
• Improved documentation
• Added functions: chr_to_matrix(), matrix_op()

doBy v4.6.16 (Release date: 2023-01-18)

Changes

• bquote_fun_list added
• Improved documentation

doBy v4.6.15 (Release date: 2022-12-08)

Changes

• restrict_fun renamed to section_fun and takes different arguments (nms, vls)

doBy v4.6.14 (Release date: 2022-10-16)

• Functions split_byrow() and split_bycol() added.
• Function expr_to_fun added.
• Functions scale2(), scaleBy() and scale_by() functions added
• Funcetion recover_pca_data() added
• added data: crime_rate (crimeRate with State variable now being rownames)
• added data: prostate and personality

doBy v4.6.13 (Release date: 2022-05-02)

• data carcassall: definition of factors corrected.
• added data cad

doBy v4.6.11 (Release date: 2021-07-13)

• restrict has been renamed to restrict_fun

• summary_mb (mb for microbenchmark) added. Faster than summary from microbenchmark package.

doBy v4.6.10 (Release date: 2021-04-29)

Changes

• specialize function removed.
• restrict function replaces specialize.

# doBy v4.6.9 (Release date: 2021-03-09)

• Improved documentation.

# doBy v4.6.8 (Release date: 2020-11-10)

• head / tail added for splitByData (a list resulting from calling splitBy)

• sapplyBy / sapply_by added

• subSeq works on factors now (coerces to character)

• sub_seq added; synonymous to subSeq

• rle2 added; similar to rle but works also on factors

• is_grouped added

• math / mathmark dataset added.

doBy v4.6.7 (Release date: 2020-07-07)

• interaction_plot (based on ggplot2 etc) added.

doBy v4.6.6 (Release date: 2020-06-16)

Bug fixes:

• esticon.gls is now exported

• xxx_by functions matching xxxBy introduced. xxx_by functions take data as first argument and work therefore well with the pipe.

doBy v4.6.5 (Release date: 2020-02-21)

Bug fixes:

• Minor issues related to checks made by the development version of R.

doBy v4.6-4.1 (Release date: 2020-02-03)

Changes:

• NAMESPACE file is being generated automatically

doBy v4.6-4 (Release date: 2020-02-01)

Changes:

• Issue related to class vs inherits solved
• NEWS file added
• Update of fev data
• cropyield data added.

doBy v4.6-3 (Release date: 2019-10-23)

Bug fixes:

• LE_matrix etc. handles a dataframe correctly for the ‘at’ argument

Changes:

• taylor function added
• fev data from isdals added
• lmBy reintroduced due to popular demand.

doBy v4.6-2 (Release date: 2018-08-30)

Changes

• sampleBy and lapplyBy functions reintroduced due to popular demand.

doBy v4.6-1 (Release date: 2018-03-19)

Changes:

• Previous functionality of core xxBy-functions reestablished to ensure that downstream packages work.

2020-04-26 Søren Højsgaard sorenh@math.aau.dk

• esticon.gls is now exported

2019-12-20 Søren Højsgaard sorenh@math.aau.dk

• Update of fev data
• cropyield data added.

2019-10-23 Søren Højsgaard sorenh@math.aau.dk

• taylor function added
• fev data from isdals added
• lmBy reintroduced due to popular demand.
• LE_matrix etc. handles a dataframe correctly for the ‘at’ argument
• Version 4.6-3 uploaded

2018-08-30 Søren Højsgaard sorenh@math.aau.dk

• sampleBy and lapplyBy functions reintroduced due to popular demand.
• Version 4.6-2 uploaded

2018-03-19 Søren Højsgaard sorenh@math.aau.dk

• Previous functionality of core xxBy-functions reestablished to ensure that downstream packages work.
• Version 4.6-1 uploaded.

2018-03-04 Søren Højsgaard sorenh@math.aau.dk

• Improvements of esticon and linest; methods added.
• Improvements of LSmeans vignette.
• Version 4.6-0 uploaded.

2016-01-01 Søren Højsgaard sorenh@math.aau.dk

• Converted to roxygen format
• Many of the less useful by functions are removed.
• Put on github

2016-02-15 Søren Højsgaard sorenh@math.aau.dk

• Updated with version requirement for R version
• slurry data added
• Version 4.5-15 uploaded.

2015-11-25 Søren Højsgaard sorenh@math.aau.dk

• NAMESPACE file updated with S3 registrations
• potatoes dataset added

2014-12-07 Søren Højsgaard sorenh@math.aau.dk

• Bug fixed in LSmatrix; thanks to Ida Bulow Christensen for the bug report.

2014-11-11 Søren Højsgaard sorenh@math.aau.dk

• linest now accepts K=NULL, in which case K is taken to be the diagonal matrix
• No longer Depend(s) on MASS
• Some datasets added
• Version 4.5-12 uploaded.

2014-09-26 Søren Højsgaard sorenh@math.aau.dk

• summaryBy did not check if each element in FUN was a function. Fixed now.
• Version 4.5-11 uploaded.

2014-09-08 Søren Højsgaard sorenh@math.aau.dk

• Added the ‘haldCement’ data
• lapplyBy: Argument keep.groupid added
• nullBasis function/method added
• popMeans function re-introduced (just a different name for LSmeans)
• dose.LD50 removed; car::deltaMethod can probably do the same.
• Version 4.5-11 uploaded.

2013-11-28 Søren Højsgaard sorenh@math.aau.dk

• LSmeans, LSmatrix and linest functions added. (There are not yet methods for nlme and survival objects but they will be added).
• popMeans and popMatrix functions removed
• Vignette on LSmeans added.
• Version 4.5-10 uploaded

2013-07-20 Søren Højsgaard sorenh@math.aau.dk

• splitBy and summaryBy have been reworked.
• formulaFunBy and xyFunBy functions added.
• Vignettes expanded.
• summaryBy, splitBy now also accept a list / vector as “formula” specification.
• recodeVar works properly on formulas
• Version 4.5-7 uploaded

2013-03-19 Søren Højsgaard sorenh@math.aau.dk

• parseGroupFormula function added. The function will take a “group formula” with a vertical bar apart into components.
• createFunBy function added. The function can create groupwise functions.
• documentation of lmBy improved
• various utility functions related to lmBy added.
• Version 4.5-6 uploaded

2012-11-16 Søren Højsgaard sorenh@math.aau.dk

• Rmarkup removed; the markdown package does a better job.
• Version 4.5-5 uploaded

2012-05-28 Søren Højsgaard sorenh@math.aau.dk

• Updates of Rmarkup
• Version 4.5-4 uploaded

2012-05-19 Søren Højsgaard sorenh@math.aau.dk

• Updates of Rmarkup
• Version 4.5-3 uploaded

2012-02-17 Søren Højsgaard sorenh@math.aau.dk

• descStat function added. Thanks to Gregor Gorjanc.
• popMeans extended so that the grid values appear in the output by default
• Version 4.5.2 uploaded

2012-01-29 Søren Højsgaard sorenh@math.aau.dk

• Minor enhancement to Rmarkup()
• Version 4.5.1 uploaded

2012-01-18 Søren Højsgaard sorenh@math.aau.dk

• popMeans method for lme objects added
• lsmeans aliases for popMeans removed
• Version 4.5.0 uploaded

2012-01-18 Søren Højsgaard sorenh@math.aau.dk

• Small changes to package structure
• Version 4.4.6 uploaded

2012-01-17 Søren Højsgaard sorenh@math.aau.dk

• URL updated
• Rscript2HTML changed to Rmarkup
• Version 4.4.5 uploaded

2011-12-30 Søren Højsgaard sorenh@math.aau.dk

• Change of email address
• Version 4.4.4 uploaded.

2011-11-01 Søren Højsgaard sorenh@agrsci.dk

• Function lmBy (and related methods) added
• Version 4.4.3 uploaded.

2011-11-01 Søren Højsgaard sorenh@agrsci.dk

• Dataset milkman added
• Version 4.4.2 uploaded.

2011-10-23 Søren Højsgaard sorenh@agrsci.dk

• funBy function added (documentation to be done)
• scaleBy function added
• Minor bug fixed in summaryBy
• popMeans extended to mer objects
• KRmodcomp, PBmodcomp etc moved to the pbkrtest package
• Version 4.4.1 uploaded.

2011-06-05 Søren Højsgaard sorenh@agrsci.dk

• subSeq function speeded up by considerably
• KRmodcomp: Kenward-Rogers method for calculating denominator degrees of freedom for F–tests in mixed models (as fitted with lmer)
• PBmodcomp, BCmodcomp, PBrefdist: Functions for calculating p-values based on parametric bootstrap for tests in mixed models (as fitted with lmer)
• Version 4.4.0 uploaded

2011-05-05 Søren Højsgaard sorenh@agrsci.dk

• HTMLreport changed to Rscript2HTML
• timeSinceEvent function enhanced
• Version 4.3.1 uploaded.

2011-03-28 Søren Højsgaard sorenh@agrsci.dk

• popMeans (lsMeans) and linMeans functions added.
• A vignette describing the use of popMeans added.
• Functions popMatrix and linMatrix added
• Version 4.3.0 uploaded

2011-02-02 Søren Højsgaard sorenh@agrsci.dk

• Bug fixed in timeSinceEvent
• More work done on HTMLreport
• Version 4.2.3 uploaded

2011-01-12 Søren Højsgaard sorenh@agrsci.dk

• HTMLreport function extended
• Version 4.2.1 uploaded

2010-12-12 Søren Højsgaard sorenh@agrsci.dk

• HTMLreport function has been added.
• Version 4.2.0 has been uploaded.

2010-11-24 Søren Højsgaard sorenh@agrsci.dk

• timeSinceEvent function has been added
• summaryBy now takes the additional argument full.dimension which when TRUE causes the result to have the same number of rows as the input dataframe.
• Version 4.1.2 has been uploaded.

2010-11-11 Søren Højsgaard sorenh@agrsci.dk

• recodevar deprecated.
• recodeVar introduced with extended functionality.
• subSeq function added.
• renameCol function added.
• Version 4.1.1 has been uploaded.

2010-11-09 Søren Højsgaard sorenh@agrsci.dk

• lsmeans function has been added.
• Version 4.1.0 has been uploaded.

2010-05-05 Søren Højsgaard sorenh@agrsci.dk

• The sugar beets dataset ‘beets’ has been added
• doBy no longer depends on Hmisc
• Version 4.0.6 has been uploaded

2009-10-21 Søren Højsgaard sorenh@agrsci.dk

• orderBy applied to a dataframe with one column only returned a vector. Has been fixed so that a dataframe is returned.
• Version 4.0.5 uploaded

2009-10-17 Søren Højsgaard sorenh@agrsci.dk

• Bug in NAMESPACE file fixed
• Version 4.0.4 uploaded

2009-10-17 Søren Højsgaard sorenh@agrsci.dk

• esticon method for ‘mer’ objects added. (Was previously for ‘lmer’ objects).
• Version 4.0.3 uploaded

2009-09-07 Søren Højsgaard sorenh@agrsci.dk

• Bug in summaryBy fixed: Strata did not match their values (as defined by the rh.variables). Thanks to Pascal Hirsch for pointing this out.
• Version 4.0.2 uploaded

2009-08-17 Søren Højsgaard sorenh@agrsci.dk

• Bug in summaryBy fixed: id vars were included in the stratification of data which they should not be. Thanks to Joshua Rest for pointing this out.
• Version 4.0.1 uploaded.

2009-07-28 Søren Højsgaard sorenh@agrsci.dk

• coxph method added for the esticon function. Thanks to Alessandro A Leidi.
• splitBy changed so that names of the entries in the list match the levels of the factors (it used to be that the names matched the levels of the factors in reverse order).
• The formula in splitBy can now also be a character vector.
• which.maxn and which.minn functions added
• Version 4.0.0 uploaded

2009-01-12 Søren Højsgaard sorenh@agrsci.dk

• splitBy had inconsistent output across cases. Fixed now
• Version 3.8 uploaded

2008-12-21 Søren Højsgaard sorenh@agrsci.dk

• splitBy failed if by-variables were constant. Fixed now.
• Version 3.7 uploaded.

2008-10-14 Søren Højsgaard sorenh@agrsci.dk

• splitBy now follows convention that first variable varies fastest.
• Version 3.6 uploaded

2008-10-14 Søren Højsgaard sorenh@agrsci.dk

• Updated description of dietox data
• Version 3.5 uploaded

2008-09-26 Søren Højsgaard sorenh@agrsci.dk

• Small bug in summaryBy fixed
• Version 3.4 uploaded

2008-09-26 Søren Højsgaard sorenh@agrsci.dk

• Small bug in summaryBy fixed
• Version 3.3 uploaded

2008-09-18 Søren Højsgaard sorenh@agrsci.dk

• Longer formulas now accepted (bug caused by a naive use of deparse())
• Version 3.2 uploaded

2008-06-13 Søren Højsgaard sorenh@agrsci.dk

• Bugs in variable names in summaryBy fixed
• Small update of documentation
• Version 3.1 uploaded

2008-05-20 Søren Højsgaard sorenh@agrsci.dk

• summaryBy speeded up; postfix argument removed
• Version 3.0 uploaded

2008-03-26 Søren Højsgaard sorenh@agrsci.dk

• Minor bugs removed.
• Version 2.3 uploaded

2008-02-13 Søren Højsgaard sorenh@agrsci.dk

• firstobs and lastobs functions added
• Version 2.2 uploaded

2007-12-05 Søren Højsgaard sorenh@agrsci.dk

• splitBy: Results becomes a splitByData object. Two attributes are added: 1) grps, which is the grouping factors coded into a single variable. 2) idxvec, (a list) which holds the position of each row in the original data set.
• lapplyBy: Following the changes above, the results of lapplyBy follows the ordering given by formula.
• subsetBy: Now subset is a logical expression, not a character string
• Version 2.1 uploaded

2007-09-30 Søren Højsgaard sorenh@agrsci.dk

• DESCRIPTION file change from Depends: Hmisc to Imports: Hmisc;

2007-05-01 Søren Højsgaard sorenh@agrsci.dk

• summaryBy: Behaviour with . on rhs of formula when data contains no factors has been corrected.
• Version 1.9 uploaded

2007-05-01 Søren Højsgaard sorenh@agrsci.dk

• Miscellaneous corrections in the .Rd files
• lapplyBy function has been added
• Vignette has been updated
• Version 1.8 uploaded

2007-04-21 Søren Højsgaard sorenh@agrsci.dk

• orderBy changed so that signs in formula determines whether to sort ascendingly or decreasingly

2007-03-21 Søren Højsgaard sorenh@agrsci.dk

• esticon extended to handle gls objects.

2006-12-14 Søren Højsgaard sorenh@agrsci.dk

• Version 1.6 uploaded

• .asNumericMatrix2 etc now work correctly with date formats

2006-11-05 Søren Højsgaard sorenh@agrsci.dk

• Version 1.5 uploaded
• Typo in package title corrected

2006-11-05 Søren Højsgaard sorenh@agrsci.dk

• Version 1.4 built and uploaded
• A warning from Kurt H (regarding gsub…) has been fixed
• Internal functions have been ‘dotted’
• A NAMESPACE file has been added
• A file describing how to generate the NAMESPACE file automatically has been added.

2006-10-23 Søren Højsgaard sorenh@agrsci.dk

• Version 1.3 built and uploaded
• Bug in splitBy corrected so that it works when rhs includes a character variable.

2006-10-23 Søren Højsgaard sorenh@agrsci.dk

• Version 1.2 built and uploaded
• Description of codstom data updated.
• matrix2dataFrame2 and subsAttr2 added
• postfix argument in summaryBy can be a list

2006-10-17 Søren Højsgaard sorenh@agrsci.dk

• Version 1.1 built and uploaded
• codstom.Rd updated
• asNumericMatrix2 added because asNumericMatrix in Hmisc does not work if a variable is of type ‘character’

2006-10-16 Søren Højsgaard sorenh@agrsci.dk

• Version 1.0 built and uploaded
• summaryBy: More issues about naming of variables have been sorted out
• summaryBy: Argument order=TRUE has been added
• summaryBy: prefix=NULL changed to postfix=NULL, argument p2d has been added

2006-10-10 Søren Højsgaard sorenh@agrsci.dk

• Version 0.9 built and uploaded
• summaryBy assigns better names to generated variables
• A vignette has been created

2006-10-03 Søren Højsgaard sorenh@agrsci.dk

• Version 0.8 built and uploaded
• Handles now ordered factors
• Fixed bug so that summaryBy now works with do.call

2006-10-01 Søren Højsgaard sorenh@agrsci.dk

• Version 0.7 built and uploaded
• splitBy is now based on functions in the Hmisc package for representing dataframes as matrices, which makes the function work also for ‘large’ (10000 rows) datasets.
• summaryBy can now take . on both lhs and rhs of “~”

2006-09-27 Søren Højsgaard sorenh@agrsci.dk

• Various bugs have been fixed

2006-09-18 Søren Højsgaard sorenh@agrsci.dk

• summaryBy has been reimplemented.
• summaryBy takes . as argument on both lhs and rhs in formula
• summaryBy, splitBy takes drop=FALSE argument (just like split does)
• transformBy function has been added

2006-02-05 Søren Højsgaard sorenh@agrsci.dk

• sampleBy modified allow for also ‘systematic samples’, e.g. every 5th row.
• summaryBy takes … arguments to FUN. No default NA action is taken.

2006-02-02 Søren Højsgaard sorenh@agrsci.dk

• A sampleBy function has been added.
• A subsetBy function has been added.

2006-01-26 Søren Højsgaard sorenh@agrsci.dk

• Function summaryBy modified so one can write log(x) on the left hand side of ‘~’
• Function summaryBy modified such that NAs are removed. What to do about Inf??

2006-01-17 Søren Højsgaard sorenh@agrsci.dk

• Function summaryBy modified to take dot (.) as lhs in formula and to take idvar = ~formula