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Bioinformatics with R Cookbook by Paurush Praveen Sinha

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Getting started and installing libraries

Libraries in R are packages that have functions written to serve specific purposes; these include reading specific file formats in the case of a microarray datafile or fetching data from certain databases, for example, GenBank (a sequence database). You must have these libraries installed in the system as well as loaded in the R session in order to be able to use them. They can be downloaded and installed from a specific repository or directly from a local path. Two of the most popular repositories of R packages are Comprehensive R Archive Network (CRAN) and Bioconductor. CRAN maintains and hosts identical, up-to-date versions of code and documentation for R on its mirror sites. We can use the install.packages ...

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