R Observatory: Metrics for picasso version 2.0.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

picasso

2.0.1Package record

Sparse Learning with Convex and Concave Penalties

0packages depend

2.9Kdownloads / year

79.7%test coverage

13/13flavors OK

Overview

About

Maintained by Tuo ZhaoCRAN page ↗

Fast regularization paths for sparse Gaussian, binomial, Poisson, square-root-lasso, and multinomial models with lasso, smoothly clipped absolute deviation, or minimax concave penalties. Computation uses pathwise coordinate optimization, active-set updates, warm starts, screening rules, Proximal Newton iterations, quadratic majorization, and adaptive local linear approximation where appropriate. Core solvers are implemented in C++, and coefficient paths are returned as Matrix-compatible objects.

Changes in 2.0.1

Portability

Updated the bundled Eigen headers from 3.3.5 to 3.4.0 so the package compiles cleanly under the C++20 default of recent R-devel toolchains (GCC 14/16), removing the -Wdeprecated-enum-enum-conversion install warnings that originated in the older Eigen sources. No package API or numerical behavior changes.

From NEWS.md in the release

Install

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

install.packages("picasso", 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-picasso

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-picasso

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-picasso

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: 5.3 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK12 OK2026-04-25
NOTE11 OK, 3 NOTE2026-03-25
WARNING10 OK, 3 NOTE, 1 WARNING2026-03-18

Show 1 earlier changeHide 1 earlier change

NOTE3 OK, 3 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.0.1

READMENoVignettesYes · 1 · staticNEWSYes · 100% structured · mentions 2.0.1Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 22includes a package overview page
Examples that run: 100%5 run in a plain check
Exported functions with examples: 20%
Documented parameters: 98%
Return-value docs: 100%
Help pages citing references: 9%

Vignettes (1)

PICASSO 2.0.0 user guide PDF

How these are measured

Downloads

2.9K

CRAN downloads in the past year

Rank #9,592 · ~8/day · ~240/mo

Releases R versions

Daily download trend is not available in this view yet.

38330 days

1K90 days

2.9K1 year

Compare downloads with other packages →

Also on450 r2u3 autocran165 c2d4u

How downloads are counted

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Installing picasso adds no packages beyond those that come with R.

Depends (2)

R >= 3.1.0Matrix

Imports (1)

methods

LinkingTo (0)

none

Suggests (1)

testthat

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 (10)

Tuo Zhao

Author, Maintainer since 1.4.1 (2026)

Jason Ge

Author · added in 0.5.4

Haoming Jiang

Author · added in 1.3.0

Xingguo Li

Author

Han Liu

Author

Mengdi Wang

Author · added in 0.5.4

Tong Zhang

Author · added in 0.5.0

Gael Guennebaud

Contributor · added in 1.4.1

Contributor to bundled Eigen headers

Benoit Jacob

Contributor · added in 1.4.1

Contributor to bundled Eigen headers

Eigen Library Authors

Copyright holder · added in 1.4.1

Copyright holders of bundled Eigen headers in src/include/eigen3

Previously maintained by Jason Ge (0.5.4 to 1.3.1) and Xingguo Li (0.1.0 to 0.5.0).

Releases (13)

Pick two releases to compare their code metrics.

2.0.1Latest
record
2026-07-25 · current release · diff ↗ ·
added 12 exports
print.multinomial, plot.multinomial, coef.multinomial, predict.multinomial, cv.picasso, print.cv.picasso, plot.cv.picasso, coef.cv.picasso, predict.cv.picasso, assess.picasso, print.assess.picasso, confusion.picasso
R
R 4.6.0 released · 2026-04-24
1.5
record
2026-03-12 · diff ↗
unarchivedReturned to CRAN
2026-03-10
1.4.1
record
first seen 2026-03-10 · diff ↗ ·
added 1 export
predict.sqrtlasso
R
R 4.5.0 released · 2025-04-11
archivedRemoved from CRAN
2025-02-09
issues were not corrected despite reminders
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
1.3.1
record
2019-02-21 · diff ↗
1.3.0
record
2018-10-03 · diff ↗
R
R 3.5.0 released · 2018-04-23

Show 12 earlier eventsHide 12 earlier events

1.2.0
record
2017-12-20 · diff ↗ ·
added 3 exports
coef.sqrtlasso, print.sqrtlasso, plot.sqrtlasso
1.0.1
record
2017-07-20 · diff ↗
R
R 3.4.0 released · 2017-04-21
0.5.4
record
2016-10-06 · diff ↗ ·
removed 10 exports
scio.generator, print.lasso, plot.lasso, coef.lasso, predict.lasso, print.scio, plot.scio, scio.plot, print.sim, plot.sim

added 8 exports
print.gaussian, plot.gaussian, coef.gaussian, predict.gaussian, print.poisson, plot.poisson, coef.poisson, predict.poisson
R
R 3.3.0 released · 2016-05-03
0.5.0
record
2015-12-18 · diff ↗
0.4.7
record
2015-09-15 · diff ↗ ·
removed 1 export
print.mvr
R
R 3.2.0 released · 2015-04-16
0.3.0
record
2014-10-19 · diff ↗
0.2.0
record
2014-10-06 · diff ↗ ·
removed 4 exports
picasso.lasso, picasso.logit, picasso.mvr, picasso.scio

added 1 export
picasso
0.1.0
record
2014-08-13
R
R 3.1.0 released · 2014-04-10

Package metadata

First published: 2014-08-13
Total releases: 13 / 12 yrs
License: GPL-3 OSI
Copyright: See inst/COPYRIGHTS for bundled third-party copyright and license notices.
Minimum R: ≥ 3.1.0
Bundled data: 176 KB / 2 files
Download size: 1.5 MB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("picasso")

Format

Zhao, T., Ge, J., Guennebaud, G., Jacob, B., Jiang, H., Li, X., Library Authors, E., Liu, H., Wang, M., & Zhang, T. (2026). picasso: Sparse Learning with Convex and Concave Penalties (Version 2.0.1) [Computer software]. https://doi.org/10.32614/CRAN.package.picasso

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 picasso version 2.0.1 [Data set]. HJJB, LLC. Data release v2026-10-23. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-23, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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