Blog Archives

Bioenergetics in R

July 7, 2015
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Bioenergetics in R

In the last few months I have received queries about whether a “fish bioenergetics” model has been implemented in R.  Here is what I am aware of. Fish Bioenergtics 4.0 (an update of the Fish Bioenergetics program distributed by Wisconsin Sea … Continue reading →

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IFAR Draft Submitted

July 4, 2015
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IFAR Draft Submitted

I have submitted a draft of the Introduction to Fisheries Analyses with R to the publisher.  It will now be submitted to a thorough editorial review in preparation for a late 2015 publication (fingers are crossed).  The draft, as a whole … Continue reading →

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FSA Modifications

July 3, 2015
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FSA Modifications

I am nearly ready to submit a draft of the Introduction to Fisheries Analysis with R book to the publisher.  Relatedly, I am preparing the FSA package to be version 1.0.0 by the time the book is released.  As part … Continue reading →

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Age & Growth with R (Portland, Oregon)

April 19, 2015
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Age & Growth with R (Portland, Oregon)

I (and Northland alum Taylor Stewart) will be leading a continuing education course on using R for typical age and growth analyses as part of the national American Fisheries Society conference in Portland, OR.  Here is the announcement on the conference webpage … Continue reading →

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New Packages for Reading Data into R

April 15, 2015
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New Packages for Reading Data into R

Hadley Wicham has announced two new package for reading external data into R that will likely be of great interest to fisheries scientists. readr — Several new functions that replace the traditional read.csv() and read.table() (among others).  Hadley’s announcement is here, … Continue reading →

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Recruitment Chapter for IFAR

April 2, 2015
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Recruitment Chapter for IFAR

I have added a very rough draft of the Recruitment chapter to the Introduction to Fisheries Analysis with R (IFAR) page.  This chapter is a complete re-working of the old Stock-Recruitment vignette and includes a section on fitting non-linear stock-recruitment … Continue reading →

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Changes to Von B Growth Modeling in FSA

March 17, 2015
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Changes to Von B Growth Modeling in FSA

In previous versions of FSA, growthModelSim() was used to produce a scatterplot of length-age data with a von Bertalanffy model superimposed where the parameters of the model were linked to slider bars that allowed the model to be dynamically changed … Continue reading →

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Mortality & Age Comparisons Chapters

March 13, 2015
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Mortality & Age Comparisons Chapters

Thanks to some very thoughtful reviews, I have dramatically updated the Mortality and Age Comparisons chapters in the Introduction to Fisheries Analysis with R book. Changes to the Age Comparisons chapter in particular resulted in major changes to the FSA … Continue reading →

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Weight-Length & Condition Chapters Updated

March 7, 2015
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Weight-Length & Condition Chapters Updated

Thanks to a couple of great reviews, I have updated the Weight-Length and Condition chapters of the forthcoming Introduction to Fisheries Analysis with R book. The suggestions resulted in some changes to the FSA package so you may want to … Continue reading →

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Data Wrangling Webinar and IFAR Chapter Update

January 22, 2015
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Data Wrangling Webinar and IFAR Chapter Update

A week or so ago I participated in the “Data Wrangling” webinar provided by RStudio.  I found Garret Gromelund’s descriptions of the functions in tidyr and dplyr to be fantastic.  A recording of the webinar is available here on the RStudio … Continue reading →

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