Getting Started with R An Introduction for Biologists

ISBN-10: 0199601623
ISBN-13: 9780199601622
Edition: 2012
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Book details

Copyright year: 2012
Publisher: Oxford University Press
Publication date: 5/24/2012
Binding: Paperback
Pages: 160
Size: 6.80" wide x 9.50" long x 0.25" tall
Weight: 0.836
Language: English

Preface
What this book is about
What you need to know to make this book work for you
How the book is organized
Why R?
Import, Explore, Graph I-Getting Started
Where to put your data
Make a folder for your instructions (code, script)
How to get your data into R and where it is stored in R's brain
Working with R-hints for a successful first (and more) interaction
Make your first script file
Starting to control R
Making R work for you-developing a workflow
And finally …
Import, Explore, Graph II-Importing and Exploring
Getting your data into R
Checking that your data is your data
Summarizing your data-quick version
How to isolate, find, and grab parts of your data-I
How to isolate, find, and grab parts of your data-II
Aggregation and how to use a help file
What your first script might look like (what you should now know)
Import, Explore, Graph III-Graphs
The first step in data analysis-making a picture
Making a picture-bar graphs
Pimp my barplot
Making a picture-scatterplots
Pimp my scatterplot: axis labels
Pimp my scatterplot: points
Pimp my scatterplot: colours (and groups)
Pimp my scatterplot: legend
Plotting extras: pdfs, layout, and the lattice package
Doing your Statistics in R-Getting Started
Chi-square
Two sample t-test
The first step: plot your data
The two sample t-test analysis
General linear models
Always start with a picture
Potential statistical and biological hypotheses-it's all about lines
Specifying the model
Plot, model, then assumptions
Interpretation
Treatment contrasts and coefficients
Interpretation
Making a publication quality figure
Coefficients, lines, and lines()
Expanded grids, prediction, and a more generic model plotting method
The final picture
An analysis workflow
Final Comments and Encouragement
Appendix: References and Datasets
Index

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