# Sequence Data are Strings¶

The first few items in our topics are very well covered in the booklet /a-little-book-of-r-for-bioinformatics.readthedocs.org.

To use function from the SeqinR package,
we first need to install the `seqinr` package (for instructions on how to
install an R package, see How to install an R package).
Once you have installed the `seqinr` R package, you can load the package by typing:

```
> library("seqinr")
```

(you have to do this at the beginning of every new R session).

## Using the Package Biostrings¶

Biostrings is our first Bioconductor package. We install it in a slightly different way than ordinary R packages.

Here are some instructions on all the steps :. Basically, after installing R you need to type:

```
> source("http://bioconductor.org/biocLite.R")
> biocLite()
```

This will ensure you a minimum number of Bioconductor
packages including `biostrings`.