heuristica

Heuristics Including Take the Best and Unit-Weight Linear

v1.0.3 · Sep 8, 2021 · MIT + file LICENSE

Description

Implements various heuristics like Take The Best and unit-weight linear, which do two-alternative choice: which of two objects will have a higher criterion? Also offers functions to assess performance, e.g. percent correct across all row pairs in a data set and finding row pairs where models disagree. New models can be added by implementing a fit and predict function-- see vignette. Take The Best was first described in: Gigerenzer, G. & Goldstein, D. G. (1996) <doi:10.1037/0033-295X.103.4.650>. All of these heuristics were run on many data sets and analyzed in: Gigerenzer, G., Todd, P. M., & the ABC Group (1999). <ISBN:978-0195143812>.

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CRAN Check Status

13 NOTE

Show all 13 flavors

Flavor	Status	Time
r-devel-linux-x86_64-debian-clang	NOTE	185s
r-devel-linux-x86_64-debian-gcc	NOTE	118.8s
r-devel-linux-x86_64-fedora-clang	NOTE	288.8s
r-devel-linux-x86_64-fedora-gcc	NOTE	370.9s
r-devel-windows-x86_64	NOTE	199s
r-oldrel-macos-arm64	NOTE
r-oldrel-macos-x86_64	NOTE	146s
r-oldrel-windows-x86_64	NOTE	264s
r-patched-linux-x86_64	NOTE	173.7s
r-release-linux-x86_64	NOTE
r-release-macos-arm64	NOTE	46s
r-release-macos-x86_64	NOTE	186s
r-release-windows-x86_64	NOTE	193s

Check details (13 non-OK)

NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-debian-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

Check History

NOTE 0 OK · 13 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Jun 9, 2026

NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-debian-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

ERROR 0 OK · 12 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Jun 8, 2026

NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

ERROR r-devel-linux-x86_64-debian-gcc

package dependencies

Package required but not available: ‘Hmisc’

See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’
manual.

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE 0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-debian-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) predictPair.Rd:20: Lost braces; missing escapes or markup?
    20 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^
checkRd: (-1) predictPairInternal.Rd:18: Lost braces; missing escapes or markup?
    18 | A number in the set {-1, 0, 1}, where 1 means row1 is predicted to
       |                     ^