2441 search results for "GIS"

Forest plots using R and ggplot2

March 9, 2011
By
Forest plots using R and ggplot2

Abhijit over at Stat Bandit posted some nice code for making forest plots using ggplot2 in R. You see these lots of times in meta-analyses, or as seen in the BioVU demonstration paper. The idea is simple - on the x-axis you have the odds ratio (or what...

Read more »

Splitting a Dataset Revisited: Keeping Covariates Balanced Between Splits

March 8, 2011
By
Splitting a Dataset Revisited: Keeping Covariates Balanced Between Splits

In my previous post I showed you how to randomly split up a dataset into training and testing datasets. (Thanks to all those who emailed me or left comments letting me know that this could be done using other means. As things go with R, it's sometimes ...

Read more »

Our Friend the Age-Earnings Profile

March 7, 2011
By
Our Friend the Age-Earnings Profile

I like Labor Economics. Partially because it has a nice mix of theory and practical empiricism, but mostly because it seems to be a sub-field with a number of agreed upon stylized facts that grow not out of micro theory … Continue reading →

Read more »

Example 8.29: Risk ratios and odds ratios

March 7, 2011
By
Example 8.29: Risk ratios and odds ratios

When can you safely think of an odds ratio as being similar to a risk ratio?Many people find odds ratios hard to interpret, and thus would prefer to have risk ratios. In response to this, you can find several papers that purport to convert an odds rat...

Read more »

Boxplots & Beyond IV: Beanplots

Boxplots & Beyond IV: Beanplots

This post is the last in a series of four on boxplots and some of their extensions.  Previous posts in this series have discussed basic boxplots, modified boxplots based on a robust asymmetry measure, and violin plots, an alternative that essentia...

Read more »

Choropleths Made Easy!

March 5, 2011
By
Choropleths Made Easy!

Choropleth Maps are very useful to visualize spatial trends. There have been several blog posts providing detailed instructions on how to create a choropleth map in R using map, spplot and ggplot2. However, I believe that the p...

Read more »

Parallel processing in R for Windows

March 4, 2011
By

The doSMP package (and its companion package, revoIPC), previously bundled only with Revolution R, is now available on CRAN for use with open-source R under the GPL2 license. In short, doSMP makes it easy to do SMP parallel processing on a Windows box with multiple processors. (It works on Mac and Linux too, but it's been relatively easy to...

Read more »

Calling R from JasperReports Server

March 2, 2011
By

Revolution Analytics today announced a partnership with Jaspersoft, the makers of the most widely-used business intelligence software in the world. With this partnership, Revolution R and Jaspersoft software work together to bring the power of analytics coded in R to business users working with Business Intelligence (BI) dashboards and reports. If you're a Jaspersoft or R developer and would...

Read more »

Bootstrapping the Truncated Normal Distribution

March 2, 2011
By
Bootstrapping the Truncated Normal Distribution

Here’s a post generated from my own ignorance of statistics (as opposed to just being marred by it)! In Labor Economics we walked through something called the truncated normal distribution. Truncated distributions come up a lot in the sciences because … Continue reading →

Read more »

Why learn R?

March 1, 2011
By
Why learn R?

I'm introducing R to a few colleagues this week and want to share why learning a software like R is important... Here are a few articles that explain it well... Other reasons?Importance of data science- Couple years ago Google's Chief Economist Hal Var...

Read more »