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https://github.com/gasparl/possa
POSSA: Power simulation for sequential analyses and multiple hypotheses.
https://github.com/gasparl/possa
multiple-testing r r-pkg sequential-analyses sequential-design statistical-analysis
Last synced: 25 days ago
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POSSA: Power simulation for sequential analyses and multiple hypotheses.
- Host: GitHub
- URL: https://github.com/gasparl/possa
- Owner: gasparl
- License: other
- Created: 2022-02-15T09:39:46.000Z (almost 3 years ago)
- Default Branch: master
- Last Pushed: 2023-04-22T05:52:48.000Z (over 1 year ago)
- Last Synced: 2024-10-15T21:41:01.454Z (about 1 month ago)
- Topics: multiple-testing, r, r-pkg, sequential-analyses, sequential-design, statistical-analysis
- Language: HTML
- Homepage:
- Size: 788 KB
- Stars: 1
- Watchers: 1
- Forks: 1
- Open Issues: 6
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
Awesome Lists containing this project
README
### POSSA: Power simulation for sequential analyses and multiple hypotheses
This R package serves to calculate, via simulation, power and appropriate "stopping" alpha boundaries (and/or futility bounds) for sequential analyses (i.e., "group sequential design") as well as for multiple hypotheses (multiple tests included in an analysis), given any specified global error rate. This enables the sequential use of practically any significance test, as long as the underlying data can be simulated in advance to a reasonable approximation.
For how to use, see the vignettes linked below.
### Installation in R
To install the stable version from [CRAN](https://cran.r-project.org/package=POSSA "The Comprehensive R Archive Network"), just run:
```R
install.packages("POSSA")
```
Then load with: `library("POSSA")`
Alternatively, if you want to install the latest (and potentially unstable) version from this repository:
```R
install.packages("devtools") # if "devtools" package is not yet installed
library("devtools")
install_github("gasparl/possa")
```
### Usage
Please see the vignettes:
1. [General introduction](https://gasparl.github.io/possa/vignettes/v_1_intro.html "POSSA: Introduction")
2. [Multiple hypotheses](https://gasparl.github.io/possa/vignettes/v_2_multiple_hypotheses.html "POSSA: Multiple hypotheses")
3. [Practical examples](https://gasparl.github.io/possa/vignettes/v_3_examples.html "POSSA: Practical examples") (unequal variances; ranked data; ANOVA; DeLong's test)
(Less important: [Benchmarking](https://gasparl.github.io/possa/vignettes/v_4_benchmarking.html "POSSA: Benchmarking"))
For detailed information about each function and parameter, see [the manual](https://github.com/gasparl/possa/blob/master/POSSA.pdf "POSSA manual").
### Support
* If you run into an error despite carefully following the [documentation](https://github.com/gasparl/possa/blob/master/POSSA.pdf "POSSA.pdf"), [open a new issue](https://github.com/gasparl/possa/issues "Issues").
* If you have sound reason to believe that some of the presented statistics or functions are not optimal and/or could be improved in some plausible way, [email me](mailto:[email protected]).
### Contributions
Given that this project is not part of my "day job", the [intended additional features](https://github.com/gasparl/possa/issues "Issues") grew beyond my capacity. Help would be most welcome; if you are up to it, feel free to [email me](mailto:[email protected]) (or to reply to the relevant issue or open a new one; see details [here](https://github.com/gasparl/possa/blob/master/CONTRIBUTING.md "CONTRIBUTING")).
### Etymology
The name "POSSA" refers not to the Italian meaning ["power, strength" (/ˈpɔs.sa/)](https://en.wiktionary.org/wiki/possa#Italian), but to the plural of ["possum" (/ˈpɑsə/)](https://en.wiktionary.org/wiki/possa#English).
### Citation
When you use POSSA in a publication, you can either cite the specific version you used (enter `citation("POSSA")` in R), or the following paper:
Lukács, G. (2022). POSSA: Power simulation for sequential analyses and multiple hypotheses. _Journal of Open Source Software, 7_(76), 4643. https://doi.org/10.21105/joss.04643
[](https://doi.org/10.21105/joss.04643)   [](https://github.com/gasparl/possa/actions) [](https://doi.org/10.5281/zenodo.6523855) [](https://app.codecov.io/gh/gasparl/possa)