useful functions

How to Shade Under a Normal Density in R

April 3, 2011 | Tony Cookson

The easiest-to-find method for shading under a normal density is to use the polygon() command. That link is to the first hit on Google for "Shading Under a Normal Curve in R." It works (like a charm), but it is not the most intuitive way to let users p...
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An easier to use IV regression command in R

March 10, 2011 | Tony Cookson

Update: I have added some functionality to my ivregress() command. Check out my newer post here.After I posted my last video tutorial on how to use my IV regression function, I received a comment asking why I didn't write the command a different way t...
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IV Regression

March 8, 2011 | Tony Cookson

Here is my code from a previous post that performs IV regression. This may be easier to copy into an R script. I will post a video tutorial using this code shortly.
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