Consider using cli for nicer printing of sampler objects? · greta-dev/greta#767

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help wanted

描述

Relatively low priority, but could be a fun project for a newcomer to greta!

We could improve the printing to use cli and maybe bullets to make the printing of the sampler object a little nicer/slick.

library(greta)
#> 
#> Attaching package: 'greta'
#> The following objects are masked from 'package:stats':
#> 
#>     binomial, cov2cor, poisson
#> The following objects are masked from 'package:base':
#> 
#>     %*%, apply, backsolve, beta, chol2inv, colMeans, colSums, diag,
#>     eigen, forwardsolve, gamma, identity, rowMeans, rowSums, sweep,
#>     tapply
hmc()
#> hmc sampler object with parameters:
#>   Lmin = 5, Lmax = 10, epsilon = 0.1, diag_sd = 1
rwmh()
#> rwmh sampler object with parameters:
#>   proposal = normal, epsilon = 0.1, diag_sd = 1
slice()
#> slice sampler object with parameters:
#>   max_doublings = 5

Created on 2025-02-13 with reprex v2.1.1

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.4.2 (2024-10-31)
#>  os       macOS Sequoia 15.1
#>  system   aarch64, darwin20
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       Australia/Perth
#>  date     2025-02-13
#>  pandoc   3.2.1 @ /opt/homebrew/bin/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version    date (UTC) lib source
#>  base64enc     0.1-3      2015-07-28 [1] CRAN (R 4.4.0)
#>  callr         3.7.6      2024-03-25 [1] CRAN (R 4.4.0)
#>  cli           3.6.3      2024-06-21 [1] CRAN (R 4.4.0)
#>  coda          0.19-4.1   2024-01-31 [1] CRAN (R 4.4.0)
#>  codetools     0.2-20     2024-03-31 [2] CRAN (R 4.4.2)
#>  crayon        1.5.3      2024-06-20 [1] CRAN (R 4.4.0)
#>  digest        0.6.37     2024-08-19 [1] CRAN (R 4.4.1)
#>  evaluate      1.0.1      2024-10-10 [1] CRAN (R 4.4.1)
#>  fastmap       1.2.0      2024-05-15 [1] CRAN (R 4.4.0)
#>  fs            1.6.5      2024-10-30 [1] CRAN (R 4.4.1)
#>  future        1.34.0     2024-07-29 [1] CRAN (R 4.4.0)
#>  globals       0.16.3     2024-03-08 [1] CRAN (R 4.4.0)
#>  glue          1.8.0      2024-09-30 [1] CRAN (R 4.4.1)
#>  greta       * 0.5.0.9000 2025-01-24 [1] local
#>  hms           1.1.3      2023-03-21 [1] CRAN (R 4.4.0)
#>  htmltools     0.5.8.1    2024-04-04 [1] CRAN (R 4.4.0)
#>  jsonlite      1.8.9      2024-09-20 [1] CRAN (R 4.4.1)
#>  knitr         1.49       2024-11-08 [1] CRAN (R 4.4.1)
#>  lattice       0.22-6     2024-03-20 [2] CRAN (R 4.4.2)
#>  lifecycle     1.0.4      2023-11-07 [1] CRAN (R 4.4.0)
#>  listenv       0.9.1      2024-01-29 [1] CRAN (R 4.4.0)
#>  magrittr      2.0.3      2022-03-30 [1] CRAN (R 4.4.0)
#>  Matrix        1.7-1      2024-10-18 [2] CRAN (R 4.4.2)
#>  parallelly    1.41.0     2024-12-18 [1] CRAN (R 4.4.1)
#>  pkgconfig     2.0.3      2019-09-22 [1] CRAN (R 4.4.0)
#>  png           0.1-8      2022-11-29 [1] CRAN (R 4.4.0)
#>  prettyunits   1.2.0      2023-09-24 [1] CRAN (R 4.4.0)
#>  processx      3.8.5      2025-01-08 [1] CRAN (R 4.4.1)
#>  progress      1.2.3      2023-12-06 [1] CRAN (R 4.4.0)
#>  ps            1.8.1      2024-10-28 [1] CRAN (R 4.4.1)
#>  R6            2.5.1      2021-08-19 [1] CRAN (R 4.4.0)
#>  Rcpp          1.0.13-1   2024-11-02 [1] CRAN (R 4.4.1)
#>  reprex        2.1.1      2024-07-06 [1] CRAN (R 4.4.0)
#>  reticulate    1.40.0     2024-11-15 [1] CRAN (R 4.4.1)
#>  rlang         1.1.5      2025-01-17 [1] CRAN (R 4.4.1)
#>  rmarkdown     2.29       2024-11-04 [1] CRAN (R 4.4.1)
#>  rstudioapi    0.17.1     2024-10-22 [1] CRAN (R 4.4.1)
#>  sessioninfo   1.2.2      2021-12-06 [1] CRAN (R 4.4.0)
#>  tensorflow    2.16.0     2024-04-15 [1] CRAN (R 4.4.0)
#>  tfruns        1.5.3      2024-04-19 [1] CRAN (R 4.4.0)
#>  vctrs         0.6.5      2023-12-01 [1] CRAN (R 4.4.0)
#>  whisker       0.4.1      2022-12-05 [1] CRAN (R 4.4.0)
#>  withr         3.0.2      2024-10-28 [1] CRAN (R 4.4.1)
#>  xfun          0.50.5     2025-01-15 [1] Github (yihui/xfun@116d689)
#>  yaml          2.3.10     2024-07-26 [1] CRAN (R 4.4.0)
#> 
#>  [1] /Users/nick/Library/R/arm64/4.4/library
#>  [2] /Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

贡献者指南

技术栈: r
领域: developer experiencecli
议题类型: feature
难度: 1
预计时间: under 1 hour
活动状态: fresh
清晰度: clear
前置要求: Basic knowledge of RFamiliarity with the cli packageUnderstanding of greta sampler object printing
新手友好度: 90
研究方向: The current printing of sampler objects (hmc, rwmh, slice) is shown in the issue as simple text. To implement this, locate the relevant print method(s) in the greta package source code (likely in an R file under R/ directory, e.g., methods for sampler classes). Then, replace the existing cat/paste calls with cli functions such as cli text(), cli bullets(), or cli h1() to produce a more structured output. The cli package is already listed in the session info, so it may be a dependency; if not, it will need to be added. The goal is to make the output visually nicer while preserving the same information.