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The 'OLStrajr' package provides comprehensive functions for ordinary least squares (OLS) trajectory analysis and case-by-case OLS regression as outlined in Carrig, Wirth, and Curran (2004) <doi:10.1207/S15328007SEM1101_9> and Rogosa and Saner (1995) <doi:10.3102/10769986020002149>. It encompasses two primary functions, OLStraj() and cbc_lm(). The OLStraj() function simplifies the estimation of individual growth curves over time via OLS regression, with options for visualizing both group-level and individual-level growth trajectories and support for linear and quadratic models. The cbc_lm() function facilitates case-by-case OLS estimates and provides unbiased mean population intercept and slope estimators by averaging OLS intercepts and slopes across cases. It further offers standard error calculations across bootstrap replicates and computation of 95% confidence intervals based on empirical distributions from the resampling processes.
| Version: | 0.1.0 |
| Depends: | R (≥ 2.10) |
| Imports: | boot, broom, ggplot2, purrr, tidyr, tidyselect |
| Suggests: | knitr, rmarkdown, testthat (≥ 3.0.0) |
| Published: | 2023-06-19 |
| DOI: | 10.32614/CRAN.package.OLStrajr |
| Author: | Mackson Ncube [aut, cre], mightymetrika, LLC [cph, fnd] |
| Maintainer: | Mackson Ncube <macksonncube.stats at gmail.com> |
| BugReports: | https://github.com/mightymetrika/OLStrajr/issues |
| License: | MIT + file LICENSE |
| URL: | https://github.com/mightymetrika/OLStrajr |
| NeedsCompilation: | no |
| Materials: | README NEWS |
| CRAN checks: | OLStrajr results |
| Reference manual: | OLStrajr.pdf |
| Vignettes: |
cbc_lm quadratic_trajectory |
| Package source: | OLStrajr_0.1.0.tar.gz |
| Windows binaries: | r-devel: OLStrajr_0.1.0.zip, r-release: OLStrajr_0.1.0.zip, r-oldrel: OLStrajr_0.1.0.zip |
| macOS binaries: | r-release (arm64): OLStrajr_0.1.0.tgz, r-oldrel (arm64): OLStrajr_0.1.0.tgz, r-release (x86_64): OLStrajr_0.1.0.tgz, r-oldrel (x86_64): OLStrajr_0.1.0.tgz |
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.