2449 search results for "GIS"

How Many Data Scientists Are There?

August 9, 2012
By
How Many Data Scientists Are There?

How Many Data Scientists Are There? I've seen a lot of articles lately about “Big Data” and the looming “talent gap.” This article from the Wall Street Journal is a good example. It cites a McKinsey estimate that states that we will need 1.5 million more managers and analysts who are conversant with “big data.” Of course, some of...

Read more »

“Trend is Not Your Friend” Applied to 48 Industries

August 8, 2012
By
“Trend is Not Your Friend” Applied to 48 Industries

Please see previous post Crazy RUT in Academic Context Why Trend is Not Your Friend. I’ll repeat the intro to the post mentioned above, so we can all get caught back up. In response to Where are the Fat Tails?, reader vonjd very helpfully referred me...

Read more »

Get a path to your Dropbox folder

August 8, 2012
By

I am currently designing my RStudio - Dropbox - Mardown/Knitter/Wordpress - Github workflow. One problem is that working on multiple machines with different version of Windows means I somehow need to tell R where my Dropbox folder is located.I used to ...

Read more »

Manipulating Data Frames Using sqldf – A Brief Overview

August 8, 2012
By

By Josh MillsIntroductionFor those who are learning R and who may be well-versed in SQL, the sqldf package provides a mechanism to manipulate R data frames using SQL. Even for experienced R programmers, sqldf can be a useful tool for data manipulation. This site provides a useful introduction to SQL. The...

Read more »

48 Industries Since 1963

August 7, 2012
By
48 Industries Since 1963

Please see http://timelyportfolio.blogspot.com/search/label/horizonplot for all horizon plot posts. Once more thanks to Ken French for his data, we can accomplish something I think is fairly amazing.  In 640x800, we can see 250 day rollling return...

Read more »

Adventures at My First JSM (Joint Statistical Meetings) #JSM2012

August 6, 2012
By
Adventures at My First JSM (Joint Statistical Meetings) #JSM2012

During the past few decades that I have been in graduate school (no, not literally) I have boycotted JSM on the notion that “I am not a statistician.” Ok, I am a renegade statistician, a statistician by training. JSM 2012 was held in San Diego, CA, one of the best places to spend a week during the summer. This...

Read more »

Crawford-Howell (1998) t-test for case-control comparisons

August 6, 2012
By
Crawford-Howell (1998) t-test for case-control comparisons

Cognitive neuropsychologists (like me) often need to compare a single case to a small control group, but the standard two-sample t-test does not work for this because the case is only one observation. Several different approaches have been proposed and in a new paper just published in Cortex, Crawford and Garthwaite (2012) demonstrate that the Crawford-Howell (1998) t-test...

Read more »

At A Glance View of the 2012 Olympics Heptathlon Performances

August 4, 2012
By
At A Glance View of the 2012 Olympics Heptathlon Performances

I spent most of today, err, yesterday, failing to hold back the tears as the medal performances from the Team GB Olympians kept rolling in… So to celebrate one of those wonderful performances, here are a couple of quick sketches of how Jessica Ennis made her medal in the Heptathlon. (The data is cut and

Read more »

Horizon Plots in Base Graphics

August 3, 2012
By
Horizon Plots in Base Graphics

for background please see prior posts More on Horizon Charts, Application of Horizon Plots, Horizon Plot Already Available, and Cubism Horizon Charts in R There are three primary graphics routes in R (base graphics, lattice, and ggplot2), and each have...

Read more »

R training: Visualization, Big Data, Data Mining, and Marketing Analytics

August 2, 2012
By

Revolution Analytics is hosting several live and online courses over the next couple of months that will be of interest to R users looking to hone their skills: Visualization in R with ggplot2. Garrett Grolemund and Winston Chang instruct how to use the ggplot2 package to make, format, label and adjust graphs using R. (August 28, Redwood City, CA.)...

Read more »