R Observatory: Metrics for postcard version 1.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

postcard

1.1.0Package record

Estimating Marginal Effects with Prognostic Covariate Adjustment

0packages depend

2.3Kdownloads / year

98.3%test coverage

11/13flavors OK

Overview

About

Maintained by Mathias Lerbech JeppesenCRAN page ↗GitHub ↗Website ↗Issues ↗

Conduct power analyses and inference of marginal effects. Uses plug-in estimation and influence functions to perform robust inference, optionally leveraging historical data to increase precision with prognostic covariate adjustment. The methods are described in Højbjerre-Frandsen et al. (2025) doi:10.48550/arXiv.2503.22284.

Changes in 1.1.0

Added functions repeat_power_marginaleffect() and repeat_power_linear() along with

plotting methods for the resulting objects to easily create data and plot power curves

from a range of sample sizes and models (#72).

Fixed print method for rctglm() and rctglm_with_prognosticscore() correctly

say "active" for the counterfactual mean estimate for group A=1 (#67).

Added a predict method for objects of class rctglm.
Added attributes with information about assumptions for the power calculation to output

of power_xx functions.

From NEWS.md in the release

Install

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

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

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

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("NovoNordisk-OpenSource/postcard")

Development version from NovoNordisk-OpenSource/postcard. Installs pak first if it is not already available.

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-postcard

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-postcard

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-postcard

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

2NOTE11OK

Check messages

NOTERd contentsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc

Rd files without \usage:
  ‘options.Rd’
\arguments should not be documented without \usage.

CRAN check page ↗

Slowest check: 8.2 min · r-oldrel-windows-x86_64

Status changes

NOTE11 OK, 2 NOTE2026-07-18
ERROR10 OK, 2 NOTE, 1 ERROR2026-07-15
NOTE12 OK, 1 NOTE2026-07-11
OK13 OK2026-06-09
ERROR12 OK, 1 ERROR2026-06-08

Show 1 earlier changeHide 1 earlier change

OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.1.0

READMEYes · 388 wordsVignettesYes · 3 · dynamicNEWSYes · 100% structured · mentions 1.1.0Citation fileNoWebsiteYes · pkgdown

Help pages: 13 (1 internal)includes a package overview page
Examples that run: 91%10 run in a plain check · 1 never run
Exported functions with examples: 100%
Documented parameters: 90%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (3)

How these are measured

Downloads

2.3K

CRAN downloads in the past year

Rank #20,220 · ~6/day · ~189/mo

Releases R versions

Daily download trend is not available in this view yet.

27130 days

65190 days

2.3K1 year

Compare downloads with other packages →

Also on73 r2u5 autocran

How downloads are counted

Repository

novonordisk-opensource/postcard ↗Organization: NovoNordisk-OpenSource

2Stars

1Forks

4Open issues

7Open PRs

3Releases

488Commits

3Commit identities

488 commits · Last activity 2026-07-15 · 0% stars, 30d · Default branch at 1.1.0.9000, ahead of CRAN 1.1.0 (checked 2026-10-18)

Responsiveness

How these are sampled

PRs merged (all time): 93%
Median days to close, 50 most recently updated closed issues: 22
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-09-03 · 12026-08-25 · 2

How these are measured

PracticesBeta

8 development-tooling and community-health practices detected across 6 families in the upstream repository

Checks run against github.com/novonordisk-opensource/postcard on 2026-10-18.

Continuous integration (1)

GitHub Actions

Docs source (3)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-10-16

pkgdown site last built 2026-07-15

Coverage (1)

Coverage reporting

CRAN release process (1)

cran-comments.md

Show all practicesHide 2 practices

Automation and maintenance (1)

Dependabot

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

24 external dependencies (excludes base and recommended)

Installing postcard adds 102 packages (48 with compiled code, 78 MB of source tarballs). Heaviest: stringi 11 MB, ggplot2 6.0 MB, data.table 5.7 MB.

Depends (0)

none

Imports (19)

cli Deriv dplyr earth generics gggrid ggplot2 options parsnip rlang rsample scalesstatsstringr tuneutilsworkflowsets xgboost yardstick

LinkingTo (0)

none

Suggests (8)

knitr LiblineaRMASSranger rmarkdown testthat (>= 3.0.0)vdiffr withr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (3)

Mathias Lerbech Jeppesen

Author, Maintainer since 1.0.0 (2025)

Emilie Hojbjerre-Frandsen

Author

Novo Nordisk A/S

Copyright holder

Releases (3)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
1.1.0Latest
record
2025-09-17 · current release · diff ↗ ·
added 2 exports
repeat_power_linear, repeat_power_marginaleffect
1.0.1
record
2025-07-01 · diff ↗
R
R 4.5.0 released · 2025-04-11
1.0.0
record
2025-04-08
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2025-04-08
Total releases: 3 / 1 yrs
License: MIT + file LICENSE OSI
Download size: 173 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("postcard")

Format

Jeppesen, M. L., Novo Nordisk A/S, & Hojbjerre-Frandsen, E. (2025). postcard: Estimating Marginal Effects with Prognostic Covariate Adjustment (Version 1.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.postcard

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for postcard version 1.1.0 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

Report a problem with this page →