# 1881 search results for "Tutorial"

## Video Tutorial on Robust Standard Errors

April 12, 2011
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Update: I have included a modified version of this summaryR() command as part of my package tonymisc, which extends mtable() to report robust standard errors. The tonymisc package is available on CRAN through the install.packages() command.If you have...

## Video Tutorial on IV Regression

April 10, 2011
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Update: I am working on a better augmentation of the current IV regression functions (specifically ivreg() in AER) in R. I will post a link here to my new method/function for IV regression when I finish debugging the code.Update 2: [15 Ma...

## R Tutorial Series: 2011 ANOVA Article Data

March 28, 2011
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Having wrapped up a recent flurry of R ANOVA articles (and exhausted my knowledge of the subject), I decided to take a look at the R Tutorial Series' Google Analytics data from the past few months. Since I posted the Two-Way Omnibus ANOVA article on J...

## R Tutorial Series: Applying the Reshape Package to Organize ANOVA Data

March 14, 2011
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As demonstrated in the preceding ANOVA tutorials, data organization is central to conducting ANOVA in R. In standard ANOVA, we used the tapply() function to generate a table for a single summary function. In repeated measures ANOVA, we used separate da...

## Video Tutorial on Instrumental Variables in R

March 8, 2011
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Update: I have replaced this video tutorial with a video tutorial on a newer, easier to use IV regression command. Check out that command here.In this video, I show how to use my instrumental variables function in R, ivreg(), along with its companion ...

## R Tutorial Series: ANOVA Pairwise Comparison Methods

March 7, 2011
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When we have a statistically significant effect in ANOVA and an independent variable of more than two levels, we typically want to make follow-up comparisons. There are numerous methods for making pairwise comparisons and this tutorial will demonstrate...

## R Video Tutorial for Spatial Statistics

March 2, 2011
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Welcome everybody, this is a video tutorial that will try to teach you how to use R for spatial statistics and interpolation. I’m a PhD student in soil science and in particular my project is about digital soil mapping. During my work I often use R particularly for geostatstical interpolation. ...

## R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes

February 28, 2011
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When the sample sizes within the levels of our independent variables are not equal, we have to handle our ANOVA differently than in the typical two-way case. This tutorial will demonstrate how to conduct a two-way ANOVA in R when the sample sizes withi...

## Tutorial on Distributions in R

February 25, 2011
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Here's a video tutorial I put together to go over how to generate a random sample from one of the commonly known parametric distributions in R.Along the way, I also discuss how some of the properties of estimators are reflected in the computations I pe...

## Choropleth tutorial and regression coefficient plots

February 21, 2011
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About two weeks ago, I gave short talk at Duke, wherein I presented a brief tutorial on creating choropleth maps in R using ggplot2. Since the code is already written, and the data and shapefiles already hosted online, I thought I would share the tutorial more widely. A .ZIP file containing all the files necessary … Continue reading →