Writing an R function to read FASTA-formatted files (CC289)

Watch along as Pat shows the development of a function for reading in a FASTA-formatted file. FASTA files are commonly used to store DNA sequence information. He uses Test Driven Development (TDD) to develop and refactor the function to suit our needs. Along the way, he makes use of temporary files using the tempfile function and a variety of functions from the stringi package that stringr is based on. This episode is part of an ongoing effort to develop an R package that implements the naive Bayesian classifier.

If you want to get a physical copy of R Packages: https://amzn.to/43pMR8L
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You can find my blog post for this episode at https://www.riffomonas.org/code_club/....

Check out the GitHub repository at the:
* Beginning of the episode: https://github.com/riffomonas/phyloty...
* End of the episode: https://github.com/riffomonas/phyloty...


#rstats #paste #paste0 #refactor #testthat #tdd #microbenchmark #vectors #rdp #16S #classification #classifier #microbialecology #microbiome

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0:00 Introduction
7:19 Working with temporary files
10:36 Basic version of read_fasta
15:37 Parsing sequence names when comments are present
21:41 Parsing comments from fasta header line
24:01 Reading in multiple lines of sequence data
37:08 Using read_fasta in vignette