Скачать с ютуб Alternative to for loops in R with purrr's map, map_dbl, and map_dfr functions (CC043) в хорошем качестве

Alternative to for loops in R with purrr's map, map_dbl, and map_dfr functions (CC043)

In this screencast tutorial, Pat Schloss shows how to use the map, map_dbl, and map_dfr functions from the purrr R package to replace your for loops. After creating our own function, we'll use map_dfr to modify code from a previous episode to recalculate the specificity of 16S rRNA genes for each taxonomic group at each taxonomic rank. This episode is part of a larger arc of episodes investigating the sensitivity and specificity of amplicon sequence variants (ASVs), also known as exact sequence variants (ESVs). ASVs are growing in popularity for analyzing microbial communities using 16S rRNA gene sequences. Pat demonstrates these concepts by live coding at the command line interface using RStudio, GitHub Flow, and make. 0:00 Introduction 2:38 Revisiting our issue 5:37 Creating a function 9:18 Repeating functions with the map functions 11:44 Creating a function for our specificity analysis 13:58 Repeating specificity analysis N times 23:22 Inference 24:26 Closing the issue 25:48 Conclusion The accompanying blog post contains the exercises and solutions can be found at http://www.riffomonas.org/code_club/2...