# gemma.R: A wrapper for Gemma’s Restful API to access curated gene expression data and differential expression analyses <img src='man/figures/logo.png' align="right" height="138" />
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This is an R wrapper for [Gemma](http://gemma.msl.ubc.ca)’s RESTful
[API](https://gemma.msl.ubc.ca/rest/v2/). Gemma is a web site, database
and a set of tools for the meta-analysis, re-use and sharing of genomics
data, currently primarily targeted at the analysis of gene expression
profiles. Gemma contains data from thousands of public studies,
referencing thousands of published papers.
## Installation instructions
### Bioconductor
You can install `gemma.R` through
[Bioconductor](http://bioconductor.org/) with the following code:
``` r
if (!requireNamespace("BiocManager", quietly = TRUE)) {
install.packages("BiocManager")
}
# The following initializes usage of Bioc devel
# it won't be necessary with the next version
# of Bioconductor
BiocManager::install(version='devel')
BiocManager::install("gemma.R")
```
## Usage
To get started with `gemma.R`, read the
[vignette](https://pavlidislab.github.io/gemma.R/articles/gemma.R.html).
## Citation
To cite Gemma, please use: [Lim, N. et al., Curation of over 10 000
transcriptomic studies to enable data reuse, Database,
2021.](https://doi.org/10.1093/database/baab006)
## Code of Conduct
Please note that `gemma.R` is released with the [Bioconductor
Contributor Code of
Conduct](http://bioconductor.org/about/code-of-conduct/). By
contributing to this project, you agree to abide by its terms.
