Code

RFC: contrast coding#870

Code

Merged

kleinschmidt merged 75 commits intoJuliaData:masterJuliaData/DataFrames.jl:masterfrom kleinschmidt:dfk/contrastskleinschmidt/DataFrames.jl:dfk/contrastsCopy head branch name to clipboardJul 31, 2016

+843-90

Commits

Commits on Jul 22, 2016

• [WIP] contrast coding flexibility

  kleinschmidt

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  49cccb1

• actually store matrix in contrast type

  kleinschmidt

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  ef415f7

• fix concat syntax, add defaults for cols/termnames, notes, and

  Show description for 45f704f
  kleinschmidt

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  45f704f

• evaluate contrast _type_ passed in dict

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  d921818

• update coefnames to be more like cols construction

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  25334cf

• fix helmert coding constructor

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  66ded8e

• modify ModelFrame contrasts in place

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  6495dd0

• tests for contrasts

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  1e8bc79

• set default contrasts, copy on predict, and test

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  9194096

• remove Base.call for 0.3 compatibility

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  83efff3

• ...and fix push!([], ...)

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  78dee18

• code review: type of matrix, spacing, validation

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  7371fe7

• factor out contrast matrix construction

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  kleinschmidt

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  2808f70

• code generation to factor out contrast type boilerplate

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  20cbb00

• stray end

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  13c4ffd

• parametrize contrast types by eltype of data

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  fe05a55

• find non-redundant columns for promoting to full rank

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  e444a41

• full-rank dummy contrasts type

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  a93a4e1

• include non_redundants in model frame

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  a0672e7

• only evaluate contrasts for columns in the df

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  d590913

• clean up mm constructor using mf cols function

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  1c76104

• fix iterator syntax and add missing Dict for kwargs

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  62a9cf7

• handle non-redundant columns right in model matrix

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  5d3bb94

• termnames checking for non-redundancy, plus tests

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  efb93fe

• default contrast is managed in formula.jl/ModelFrame

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  bdb2119

• introduce ContrastMatrix type

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  9eb4570

• add @compat on Dicts

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  03303ef

• optionally specify levels and base level

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  b2c0475

• actually used specified levels (+tests)

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  c3eae6e

• actually, don't allow baseind in Contrast(...)

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  1e05fd0

• docstrings for contrasts

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  0b87e93

• settled on behavior for mismatched levels

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  ca5be00

• coerce levels when constructing ContrastMatrix

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  74eed83

• move cols and termnames to be w/ friends

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  5415c3b

• use "x: a" instead of "x - a" for termnames

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  b09b847

• Contrast -> Contrasts

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  04c702e

• cols -> modelmat_cols

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  eaee627

• revise documentation

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  0dc6fa3

• contrast! -> setcontrasts!

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  b3c547c

• test for 1 + x&y when x and y are categorical

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  1e875ca

• code review

  Show description for faa592f
  kleinschmidt

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  faa592f

• generalize termnames generation

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  566adae

• rename C->contrasts in ContrastsMatrix constructor

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  87e0662

• type parameters + convert for promote_contrast

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  c405df5

• restrict type in model frame contrasts dict

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  bdcca01

• clean up check_non_redundancy

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  eb44d54

• replace needsContrasts and can_promote with is_categorical

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  dc261c2

• explicit tuple and clearer if/index

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  4106835

• evaluateContrasts -> ContrastMatrix methods

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  34402bf

• pass contrasts in DataFramesModel fitting

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  109df41

• contrastsmatrix constructor fix and test

  Show description for c26d2ec
  kleinschmidt

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  c26d2ec

• more tests: redundancy

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  7493d9a

• use get for Nullable contrasts.base

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  433bfd2

• [WIP] documenting contrasts in formulas.md

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  83b6f96

• rep -> Compat.repeat

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  f515628

Commits on Jul 23, 2016

• merge refactored ModelMatrix

  Show description for 997d963
  kleinschmidt

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  997d963

• fix Nothing failure on nightlies

  kleinschmidt

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  5410e21

• use throw(ArgumentError()) instead of error()

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  95c515d

Commits on Jul 26, 2016

• rename contrasts

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  8798f3b

• wrap long error message lines

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  d7ce429

Commits on Jul 27, 2016

• add ContrastsCoding

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  8632624

Commits on Jul 30, 2016

• update docstrings

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  42c5b6f

• explicit test for dummy coding

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  ea3ff23

• vector -> abstractvector

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  4108bef

• one-line summaries of coding schemes

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  666647f

• replace ternary operator with explicit if

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  527e248

• do not convert levels on contrasts to data type

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  3c4a144

• no space after !

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  709740c

• cosmetic tweaks

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• contrasts types must be instantiated

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  94ec01e

• move todo

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Commits on Jul 31, 2016

• fix doc to use concrete type

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  796c871

• add tests for specifying contrasts in fit()

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  a20f290

• typealiases for R names

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  a2e3ff5

• Revert "typealiases for R names"

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  c113bbe