studyStrap

1.0.0

Study Strap and Multi-Study Learning Algorithms

0packages depend

2.2Kdownloads / year

–test coverage

0/13checks pass

Overview

About

Maintained by Gabriel LoewingerFirst published 2020-02-201 releasesCRAN page ↗

Implements multi-study learning algorithms such as merging, the study-specific ensemble (trained-on-observed-studies ensemble) the study strap, the covariate-matched study strap, covariate-profile similarity weighting, and stacking weights. Embedded within the 'caret' framework, this package allows for a wide range of single-study learners (e.g., neural networks, lasso, random forests). The package offers over 20 default similarity measures and allows for specification of custom similarity measures for covariate-profile similarity weighting and an accept/reject step. This implements methods described in Loewinger, Kishida, Patil, and Parmigiani. (2019) doi:10.1101/856385.

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("studyStrap", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-studystrap

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-studyStrap

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-studyStrap

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13NOTE

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc
NOTE r-devel-linux-x86_64-fedora-clang
NOTE r-devel-linux-x86_64-fedora-gcc
NOTE r-devel-windows-x86_64
NOTE r-oldrel-macos-arm64
NOTE r-oldrel-macos-x86_64
NOTE r-oldrel-windows-x86_64
NOTE r-patched-linux-x86_64
NOTE r-release-linux-x86_64
NOTE r-release-macos-arm64
NOTE r-release-macos-x86_64
NOTE r-release-windows-x86_64

Slowest check: 5.2 min · r-devel-linux-x86_64-fedora-gcc

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Yes

Vignettes

README

Dependencies · direct

Check history

NOTE2026-06-09
0 OK · 13 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
0 OK · 12 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
WARNING2026-06-07
0 OK · 12 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-05-02
0 OK · 13 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-25
0 OK · 11 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE

Show 1 earlier snapshots

NOTE2026-03-10
0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Downloads

2.2K

CRAN downloads in the past year

Rank #19,400 · ~6/day · ~184/mo

Releases R versions

Daily download trend is not available in this view yet.

26330 days

61190 days

2.2K1 year

Compare downloads with other packages →

Also on92 r2u13 autocran

Dependencies

Declared dependencies

10 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.1

Imports (8)

caret tidyverse pls nnls CCA MatrixCorrelation dplyr tibble

LinkingTo (0)

none

Suggests (2)

knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 1,724 (62%)Rd 664 (24%)Vignettes 393 (14%)

Code characteristics

Cyclomatic complexity: 7.0 median / 38 max
Documented parameters: 92%

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

7 7 exported

Complexity

14.7 avg / 38 max

Call network

7 nodes / 7 edges

Test coverage has not been measured for this package yet; nodes fall back to a neutral fill.

Call graph

Open call graph →

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Lowest coverage

Per-function coverage is not measured for this package yet.

People & History

People (5)

Maintainer (1)

Gabriel Loewinger

Author, Maintainer

Authors (1)

Gabriel Loewinger

Author, Maintainer

Funders (2)

National Science Foundation Grant DMS1810829

Funder

National Institutes of Health Grant T32 AI 007358

Funder

Other (2)

Giovanni Parmigiani

Thesis advisor

Prasad Patil

sad

Release timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.0.0Latest
2026-03-10 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2020-02-20
Total releases: 1 / 6 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.1
Download size: 36 KB
Installed size: not tracked yet
With dependencies: not tracked yet