# Monthly Archives: January 2010

## Some Python Nooks and Crannies

January 31, 2010
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I spent this weekend reading Learning Python (Second Edition for Python 2.3!) by Mark Lutz. Python is my favorite programming language, but my experience with it has been mostly anecdotal; I come up with my own solutions and functions and I Google whatever I do not know. I decided to spend a couple of days with this incredibly out-of-date...

## Rcpp 0.7.4

January 31, 2010
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Yesterday, and about nine days after release 0.7.3 of Rcpp (a set of R / C++ interface classes), Romain and I released version 0.7.4. It has been uploaded to CRAN and Debian, and mirrors should already have new versions. As before, my local page is ...

## With With

January 31, 2010
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No that is not a typo in the title. In my programming a came across a solution that I thought was pretty cool. I have a function that basically takes two objects and passes the elements of the objects to another function as arguments. This is a pret...

## Congruential generators all are RANDUs!

January 30, 2010
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$Congruential generators all are RANDUs!$

In case you did not read all the slides of Regis Lebrun’s talk on pseudo-random generators I posted yesterday, one result from Marsaglia’s (in a 1968 PNAS paper) exhibited my ignorance during Regis’ Big’ MC seminar on Thursday. Marsaglia indeed showed that all multiplicative congruential generators lie on a series of hyperplanes whose number gets ridiculously

## Practical Implementation of Neural Network based time series (stock) prediction – PART 2

January 30, 2010
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As a brief follow up to the series, I want to take a moment to describe a bit about Weka, which is the machine learning tool that we will be using to implement the neural network. It is a fantastic open source JAVA based tool that was developed at the...

## Mining Tuition Data for US Colleges and Universities, and a Tangent

January 30, 2010
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I wrote this script for the UCLA Statistical Consulting Center. I don’t know all of the specifics, but one of our faculty members has this idea that we can help our paper, The Daily Bruin, with their graphics or something to that effect. I don’t quite understand because our paper has never really been big on graphics for data,...

## Practical Implementation of Neural Network based time series (stock) prediction – PART 1

January 29, 2010
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The following introduction is to allow viewers to understand the basic concepts and practical implementation of neural nets towards a financial time series. I will not go too deep into detail about the mathematics behind the neural net at the moment. ...

## Big’MC seminar

January 29, 2010
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Two very interesting talks at the Big’ MC seminar on Thursday: – Phylogenetic models and MCMC methods for the reconstruction of language history by Robin Ryder – Uniform and non-uniform random generators by Régis Lebrun which are both on topics close to my interest, evolution of languages (I’ll be a philologist in another life!) and uniform random generators. Filed

## R creators win prestigious Statistical Computing and Graphics Award

January 29, 2010
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The American Statistical Association recently created a new, bi-annual award to to recognize an individual or team for innovation in computing, software, or graphics that has had a great impact on statistical practice or research. The committee has just announced the winner (or in this, joint winners) of the first award: Robert Gentleman and Ross Ihaka, for their work...

## Crayola crayon colors, 1949-present

January 29, 2010
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Here's an example I featured in my list of 7 Awesome Things about R (awesome thing #3: graphics and data visualization). The Learning R blog features a reproduction of a graphic that recently appeared on Flowing Data. It shows the colors in a box of Crayola crayons: before 1949 there were only 8, but over the years additional colors...