1306 search results for "excel"

The Next Big Thing: SAS and SPSS!…wait, what?

April 15, 2010
By
The Next Big Thing: SAS and SPSS!…wait, what?

Thanks to the R Bloggers aggregator I came across Yihui Xie’s post on a piece currently making the rounds about statistical analysis platforms. In The Next Big Thing, AnnMaria De Mars makes the argument that R—as a statistical computing platform—is not well suited for what she views as the next big things in data

Read more »

Saving the world with R

April 15, 2010
By

Tuesday's meeting of the Bay Area R UseR Group at the LinkedIn offices was a great event. The headline speaker was Joe Adler, author of the excellent R reference manual, R in a Nutshell. Joe's presentation was an in-depth look at the relative speed of various options in R for looking up values from a key in a key-value...

Read more »

ProbABEL – R package for GWAS data imputation

April 6, 2010
By

I've been using GenABEL for some time now for GWAS analysis using related individuals. It has an excellent set of functions for estimating a kinship matrix from a dense marker panel and then using this in a linear mixed effects model to allow for relat...

Read more »

CLT Standard Normal Generator

April 2, 2010
By
CLT Standard Normal Generator

I’ve found this standard normal random number generator in a number of places, one of which being from one of Paul Wilmott’s books. The idea is that we can use the Central Limit Theorem (CLT) to easily generate values distributed according to a standard normal distribution by using the sum of 12 uniform random

Read more »

abbreviating personality measures in R: a tutorial

March 31, 2010
By
abbreviating personality measures in R: a tutorial

A while back I blogged about a paper I wrote that uses genetic algorithms to abbreviate personality measures with minimal human intervention. In the paper, I promised to put the R code I used online, so that other people could download and use it. I put off doing that for a long time, because the

Read more »

Modified Donchian Band Trend Follower using R, Quantmod, TTR -Part 2: Parameter Sweep Sensitivity over long run

March 24, 2010
By
Modified Donchian Band Trend Follower using R, Quantmod, TTR  -Part 2: Parameter Sweep Sensitivity over long run

Here is a small update to the Donchian Channel type system I displayed in the last post.Fig 1. Sensitivity of Net Combined L/S Gain to parameter n.Using the S&P500 index as a proxy for the market, a simulation was run over the lifetime of the index. No...

Read more »

Font Families for the R PDF Device

March 24, 2010
By

otivated by the excellent R package pgfSweave, I begin to notice the font families in my graphs when writing Sweave documents. The default font family for PDF graphs is Helvetica, which is, in most cases (I think), inconsistent with the LaTeX font styles. Some common font families are listed in ?postscript, and we can take

Read more »

Updated Site Map for Jeromy Anglim’s Blog Psychology and Statistics

March 23, 2010
By

Every Six months or so I like to update the Site Mapfor my blog jeromyanglim.blogspot.com. Thus, if you're new to the blog, The Site Map provides an overview of previous blog content organised by topic. RSS Feed: http://feeds.feedburner.com/jeromyang...

Read more »

Updated Site Map for Jeromy Anglim’s Blog Psychology and Statistics

March 23, 2010
By

Every Six months or so I like to update the Site Mapfor my blog jeromyanglim.blogspot.com. Thus, if you're new to the blog, The Site Map provides an overview of previous blog content organised by topic. RSS Feed: http://feeds.feedburner.com/jeromyang...

Read more »

R Tips in Stat 511

March 22, 2010
By
R Tips in Stat 511

Here are some (trivial) R tips in the course Stat 511. I’ll update this post till the semester is over. Formatting R Code Reading code is pain, but the well-formatted code might alleviate the pain a little bit. The function tidy.source() in the animation package can help us format our R code automatically. By default

Read more »