2440 search results for "GIS"

Speeding up R with Intel’s Math Kernel Library (MKL)

May 2, 2012
By

I did some comparisons of the generic BLAS with Intel's MKL (both sequential and parallel) on a Dell PowerEdge 610 server with dual hyperthreading 6-core 3.06GHz Xeon X5675 processors.  Here are the results from an R benchmarking script (Normal R indicates the generic BLAS,  sMKL is the sequential (single core Intel MKL, and pMKL is the parallel Intel MKL using...

Read more »

A gallery view for Craigslist

May 1, 2012
By
A gallery view for Craigslist

As much as I love Craigslist, I sometimes find the interface a bit limited. My biggest wish? That there was an option for showing the search results as an image gallery, like eBay has. This could prove quite useful for browsing things like antiques,...

Read more »

Mining for relations between nominal variables

May 1, 2012
By
Mining for relations between nominal variables

The task today was to find what variables had significant relations with an important grouping variable in the big dataset I’ve been working with lately.  The grouping variable has 3 levels, and represents different behaviours of interest.  At first I … Continue reading →

Read more »

NSF BIGDATA webinar

May 1, 2012
By

If you're doing any kind of big data analysis - genomics, transcriptomics, proteomics, bioinformatics - then unless you've been on vacation the last few weeks you've no doubt heard about the NSF/NIH BIGDATA  Initiative (here's the NSF solicitation...

Read more »

French Global Factors

April 30, 2012
By
French Global Factors

I have said it already in multiple posts, but Kenneth French’s data library is one of the most generous and powerful contributions to the financial community.  To build on Systematic Investor’s series on factors, I thought I should run some ba...

Read more »

Incompetence borne of excessive cleverness

April 29, 2012
By

I have just got back from the 24 hour Data Science Global Hackathon; I was an on-site participant at Hub Westminster in London (thanks to Carlos and his team for doing such a great job looking after us all {around 50 turned up from the 100 who registered; the percentage was similar in other cities

Read more »

Marriage is good for your income

April 29, 2012
By
Marriage is good for your income

For those of you who are into machine learning, here you can find a cool collection of databases to play around with your favorite algorithm. I choose one out of the available 200 and fit a logistic regression model. The idea … Continue reading →

Read more »

Guess who wins: apply() versus for loops in R

April 28, 2012
By
Guess who wins: apply() versus for loops in R

Yesterday I tried to do some data processing on my really big data set in MS Excel. Wow, did it not like handling all those data!! Every time I tried to click on a different ribbon, the screen didn’t even … Continue reading →

Read more »

R Workshop: Reproducible Research using Sweave for Beginers

April 27, 2012
By
R Workshop: Reproducible Research using Sweave for Beginers

Monday, April 30, 2012  14h-16h. Stewart Biology Rm w6/12 (Montreal) guRu: Denis Haine (Université de Montréal) Topics Reproducible research was first coined by Pr. Jon Claerbout, professor of geophysics at Stanford University, to describe that the results from researches can be replicated by other scientists by making available data, procedures, materials and the computational environment

Read more »

How to download complete XML records from PubMed and extract data

April 27, 2012
By
How to download complete XML records from PubMed and extract data

Yesterday I wrote an article that looked at the top 20 Cognitive Behavior Therapy journals with the most publications; today I will explain how I did it with R.

Read more »