I spent some time this morning learning about how R thinks about dates in R. I found this website to be a useful guide.Imagine that your data are dates in a standard format and you want a vector o...
Blog Archives
Good Looking Maps in R
I haven't yet tried this, but it looks like a nice package.In one recent project I needed to draw several maps and visualize different kinds of geographical data on it. I found the combination of R/ggplot/maps package extremely flexible and powerful,...
Good Looking Maps in R
I haven't yet tried this, but it looks like a nice package.In one recent project I needed to draw several maps and visualize different kinds of geographical data on it. I found the combination of R/ggplot/maps package extremely flexible and powerful,...
Common Data Creation Commands
Here is a video tutorial where I go through some of the most commonly used commands in creating and manipulating data. As soon as I want to do more than just running a single regression, I use these commands more than any other set of commands (in som...
Common Data Creation Commands
Here is a video tutorial where I go through some of the most commonly used commands in creating and manipulating data. As soon as I want to do more than just running a single regression, I use these commands more than any other set of commands (in som...
A Population Regression
Here's a video on some of the theory behind simple linear regression.There's no R involved with this video, but the video provides some theory behind what it is that R's lm() command estimates.
A Population Regression
Here's a video on some of the theory behind simple linear regression.There's no R involved with this video, but the video provides some theory behind what it is that R's lm() command estimates.
A Creative Use of R
Update (5/18/2011): Looks like Freakonomics approves as well. Let the record show that I approved first :)I approve: "I use the open-source program R to create the patterns."But, I'm not sure I approve of calling these distributions "evil."In case you...
A Creative Use of R
Update (5/18/2011): Looks like Freakonomics approves as well. Let the record show that I approved first :)I approve: "I use the open-source program R to create the patterns."But, I'm not sure I approve of calling these distributions "evil."In case you...
Computing Statistical Power
Today's task is to compute a statistical power function in R. For a good definition of power, go here. Thinking about the power of a testing procedure is an often-overlooked aspect of hypothesis testing.I also explain what power (in a statistical sens...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
