R Observatory: Metrics for blendR version 1.0.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

blendR

1.0.0Package record

Blended Survival Curves

0packages depend

2.5Kdownloads / year

7.4%test coverage

13/13flavors OK

Overview

About

Maintained by Zhaojing CheCRAN page ↗GitHub ↗Website ↗Issues ↗

Create a blended curve from two survival curves, which is particularly useful for survival extrapolation in health technology assessment. The main idea is to mix a flexible model that fits the observed data well with a parametric model that encodes assumptions about long-term survival. The two curves are blended into a single survival curve that is identical to the first model over the range of observed times and gradually approaches the parametric model over the extrapolation period based on a given weight function. This approach allows for the inclusion of external information, such as data from registries or expert opinion, to guide long-term extrapolations, especially when dealing with immature trial data. See Che et al. (2022) doi:10.1177/0272989X221134545.

Changes in 1.0.0

_January 2025_

Initial CRAN submission.

Key Features:

Function blendsurv(): This is the main function in the {blendR} package.

Two survival curves are supplied and blended according to the blending distribution characterised by the blending interval and the beta distribution parameters.

Function plot(): Visualize blending courves.
Full documentation for all functions and datasets.
Compatible with R version 4.0.0 and above.

From NEWS.md in the release

Install

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

install.packages("blendR", 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("StatisticsHealthEconomics/blendR")

Development version from StatisticsHealthEconomics/blendR. 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-blendr

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-blendR

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-blendR

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

13OK

CRAN check page ↗

Slowest check: 3.6 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-12
NOTE12 OK, 1 NOTE2026-08-08
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-09

Show 5 earlier changesHide 5 earlier changes

ERROR12 OK, 1 ERROR2026-06-08
OK12 OK2026-04-25
NOTE11 OK, 3 NOTE2026-04-06
ERROR10 OK, 3 NOTE, 1 ERROR2026-04-04
NOTE11 OK, 3 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.0.0

READMEYes · 234 wordsVignettesNoNEWSYes · 100% structured · mentions 1.0.0Citation fileNoWebsiteYes · pkgdown

Help pages: 9 (1 internal)
Examples that run: 80%4 run in a plain check (3 of them under a condition) · 1 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 80%
Documented parameters: 83%
Return-value docs: 100%
Help pages citing references: 0%

How these are measured

Downloads

2.5K

CRAN downloads in the past year

Rank #15,614 · ~7/day · ~207/mo

Releases R versions

Daily download trend is not available in this view yet.

29130 days

79390 days

2.5K1 year

Compare downloads with other packages →

Also on85 r2u21 autocran

How downloads are counted

Repository

statisticshealtheconomics/blendr ↗Organization: StatisticsHealthEconomics

1Stars

1Forks

4Open issues

0Open PRs

2Releases

215Commits

3Commit identities

License file reads as GPL-3.0 · 215 commits · Last activity 2026-10-22 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 0
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2023-11-28 · 12026-07-07 · 1

How these are measured

PracticesBeta

11 development-tooling and community-health practices detected across 7 families in the upstream repository

Checks run against github.com/statisticshealtheconomics/blendr on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Governance and community (2)

Code of conductContributing guide

Docs source (2)

pkgdown

GitHub Pages site last deployed 2026-10-07

Coverage (1)

Coverage reporting

Show all practicesHide 3 practices

CRAN release process (2)

cran-comments.mdrevdep/

Research and citation (1)

CITATION.cff

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Installing blendR adds 92 packages (52 with compiled code, 91 MB of source tarballs). Heaviest: stringi 11 MB, xlsxjars 9.8 MB, TH.data 8.2 MB.

Depends (1)

R >= 4.4.0

Imports (7)

dplyr flexsurv ggplot2 manipulate sn survHE tibble

LinkingTo (0)

none

Suggests (8)

INLA knitr remotes rlang rmarkdown survHEhmcsurvivaltestthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (2)

Zhaojing Che

Nathan Green

Author

Releases (1)

R
R 4.6.0 released · 2026-04-24
1.0.0Latest
record
2025-09-03 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-09-03
Total releases: 1 / 1 yrs
License: GPL (>= 3) OSI
Additional repositories: giabaio.r-universe.dev, inla.r-inla-download.org
Minimum R: ≥ 4.4.0
Bundled data: 3.2 KB / 1 file
Download size: 253 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("blendR")

Format

Che, Z., & Green, N. (2025). blendR: Blended Survival Curves (Version 1.0.0) [Computer software]. https://doi.org/10.32614/CRAN.package.blendR

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

The repository also keeps a CITATION.cff.

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 blendR version 1.0.0 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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