postcard

1.1.0

Estimating Marginal Effects with Prognostic Covariate Adjustment

0packages depend

2.3Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Mathias Lerbech JeppesenFirst published 2025-04-083 releasesCRAN page ↗GitHub ↗

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.

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.

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).

Health

CRAN checks

13OK

Slowest check: 12.2 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 2.29

not tracked

Coverage

100%

Documentation · exports

Yes

Vignettes

Yes

README

Dependencies · direct

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Downloads

2.3K

CRAN downloads in the past year

Rank #20,214 · ~6/day · ~194/mo

Releases R versions

Daily download trend is not available in this view yet.

24130 days

59390 days

2.3K1 year

Compare downloads with other packages →

Also on113 r2u17 autocran

Repository

GitHub ↗ novonordisk-opensource/postcard

1Stars

1Forks

4Open issues

1Open PRs

3Releases

480 commits · 0% stars, 30d

Stars over time

2025-09-03 · 12026-07-07 · 1

Dependencies

Declared dependencies

24 external dependencies (excludes base and recommended)

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.

Code & Tests

Code Composition

R 4,849 (53%)Markdown 2,349 (26%)Rd 1,389 (15%)Vignettes 585 (6%)

Code characteristics

Object systems

S313

Cyclomatic complexity: 1.0 median / 6 max
Test cases: 74 / 2.29 per code line
Documented parameters: 90%

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

79 15 exported

Complexity

1.7 avg / 6 max

Call network

79 nodes / 74 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 (3)

Maintainer (1)

Mathias Lerbech Jeppesen

Author, Maintainer

Authors (2)

Mathias Lerbech Jeppesen

Author, Maintainer

Emilie Hojbjerre-Frandsen

Author

Novo Nordisk A/S

Release timeline

3 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.1.0Latest
2025-09-17 · current release · diff ↗
1.0.1
2025-07-01 · diff ↗
R
R 4.5.0 released · 2025-04-11
1.0.0
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
Installed size: not tracked yet
With dependencies: not tracked yet