I have added two new drafts of chapters for the Introductory Fisheries Science with R book.  Both chapters are still rough, but feedback would be greatly appreciated.

The first chapter is an introduction to basic data manipulations, largely using the (relatively) new dplyr package.  Sections in this chapter include “Reading Data into R” (largely from CSV files, with mention of other files), “Basic Data Manipulations” (including filtering, selecting variables or individuals, renaming variables, creating new variables, creating length categorization variables, recoding factor variables, and sorting), “Joining Data Frames”, “Re-Arranging Data Frames” (wide and long formats), and “New Data Frames from Aggregation.”

The second chapter is related to condition metrics and includes a very basic introduction to one-way analysis of variance.

Both chapters precipitated changes to the FSA package, which are detailed in the NEWS files.  Thus, it is best to download the very latest version of FSA.

Let me know if you have questions, comments, or suggestions for improvements.  Thanks.