Monthly Archives: December 2010

one-dimensional integrals

December 25, 2010
By
one-dimensional integrals

The foundamental idea of numerical integration is to estimate the area of the region in the xy-plane bounded by the graph of function f(x). The integral was esimated by divide x to small intervals, then add all the small approximations to give a total approximation.Read More: 468 Words Totally

Read more »

one-dimensional integrals

December 25, 2010
By
one-dimensional integrals

The foundamental idea of numerical integration is to estimate the area of the region in the xy-plane bounded by the graph of function f(x). The integral was esimated by divide x to small intervals, then add all the small approximations to give a total approximation.Read More: 468 Words Totally

Read more »

Chromosome bias in R, my notebook

December 23, 2010
By
Chromosome bias in R, my notebook

My goal is to develop a means of detecting chromosome bias from a human BAM file.Because I've been working with proprietary and novel plant genomes for the last three years, I haven't had the chance to use any of the awesome UCSC-based annotational features that have been introduced and refined in Bioconductor until now. I've returned to biomedical research...

Read more »

Chromosome bias in R, my notebook

December 23, 2010
By
Chromosome bias in R, my notebook

My goal is to develop a means of detecting chromosome bias from a human BAM file.Because I've been working with proprietary and novel plant genomes for the last three years, I haven't had the chance to use any of the awesome UCSC-based annotational features that have been introduced and refined in Bioconductor until now. I've returned to biomedical research...

Read more »

Did you feel that?

December 23, 2010
By
Did you feel that?

There was a small earthquake in northern England on Tuesday. Barry Rowlingson felt the quake (it rattled the photographs on his wall), but didn't know how big of a quake it was because he didn't know how close he was to the epicentre. The British Geological Survey hadn't yet announced the quake, but did give access to seismograph readings,...

Read more »

Citizen Data Journalism: Mexico Homicides

December 23, 2010
By
Citizen Data Journalism: Mexico Homicides

I've recently praised some mainstream media outlets like the New York Times and New Scientist for leading the charge on data journalism. But you don't need to be a large organization to find news in data. With open data sources, and open-source data analysis tools, individuals can make newsworthy discoveries. Diego Valle-Jones has been investigating the impact of the...

Read more »

R function to convert degrees to radians

December 23, 2010
By
R function to convert degrees to radians

I would have never imagined that I would have to go back to high school concepts and do strange trigonometric calculations. However, it happened to me that I needed to convert GPS coordinates of a large data set to radians. It’s a trivial task, if you know how to do it. The function takes as

Read more »

Project Euler — Problem 187

December 23, 2010
By

http://projecteuler.net/index.php?section=problems&id=187A composite is a number containing at least two prime factors. For example, 15 = 3 × 5; 9 = 3 × 3; 12 = 2 × 2 × 3.There are ten composites below thirty containing precisely two, not necessarily distinct, prime factors: 4, 6, 9, 10, 14, 15, 21, 22, 25, 26.Read...

Read more »

Project Euler — Problem 187

December 23, 2010
By

http://projecteuler.net/index.php?section=problems&id=187A composite is a number containing at least two prime factors. For example, 15 = 3 × 5; 9 = 3 × 3; 12 = 2 × 2 × 3.There are ten composites below thirty containing precisely two, not necessarily distinct, prime factors: 4, 6, 9, 10, 14, 15, 21, 22, 25, 26.Read...

Read more »

Some problems with the Mexican mortality database

December 22, 2010
By
Some problems with the Mexican mortality database

I've written before about how I couldn't find the Acteal Massacre in the homicide database available at the INEGI. So I decided to check if the deaths that occurred as a consequence of the massacre were misclassified as other types of violent death,and indeed they were. In the municipality of Chenalhó,...

Read more »