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# gtools R package
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[](https://www.r-pkg.org/pkg/gtools)
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The `gtools` R package provides functions to assist in R programming,
including:
- assist in developing, updating, and maintaining R and R packages
(`ask`, `checkRVersion`, `getDependencies`, `keywords`, `scat`),
- calculate the logit and inverse logit transformations (`logit`,
`inv.logit`),
- test if a value is missing, empty or contains only NA and NULL
values (`invalid`),
- manipulate R’s .Last function (`addLast`),
- define macros (`defmacro`),
- detect odd and even integers (`odd`, `even`),
- convert strings containing non-ASCII characters (like single quotes)
to plain ASCII (`ASCIIfy`),
- perform a binary search (`binsearch`),
- sort strings containing both numeric and character components
(`mixedsort`),
- create a factor variable from the quantiles of a continuous variable
(`quantcut`),
- enumerate permutations and combinations (`combinations`,
`permutation`),
- calculate and convert between fold-change and log-ratio
(`foldchange`, `logratio2foldchange`, `foldchange2logratio`),
- calculate probabilities and generate random numbers from Dirichlet
distributions (`rdirichlet`, `ddirichlet`),
- apply a function over adjacent subsets of a vector (`running`),
- modify the TCP\_NODELAY (`de-Nagle`) flag for socket objects,
- efficient `rbind` of data frames, even if the column names
don`t match (`smartbind\`),
- generate significance stars from p-values (`stars.pval`),
- convert characters to/from ASCII codes (`asc`, `chr`),
- convert character vector to ASCII representation (`ASCIIfy`).
- apply title capitalization rules to a character vector (`capwords`)
## Installation
You can install the released version of gtools from
[CRAN](https://CRAN.R-project.org) with:
``` r
install.packages("gtools")
```
And the development version from [GitHub](https://github.com/) with:
``` r
# install.packages("devtools")
devtools::install_github("r-gregmisc/gtools")
```
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