1107 search results for "tutorial"

sab-R-metrics: Intermediate Scatter Plots

January 25, 2011
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sab-R-metrics: Intermediate Scatter Plots

First off, I'll say it's been a whirlwind of a past few days. Thanks to David Smith at the Revolutions Blog for his kind words about the sab-R-metrics series and link back this way. Add in Ed Kupfer's posts at the APBRmetrics board, Harry Pavlidis at THT, Dave Allen at Fangraphs...

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Blackbox trading Strategy using Rapidminer and R

January 23, 2011
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Blackbox trading Strategy using Rapidminer and R

This my first post in 2011. this post has cost me a bit more than usual, but I hope it meets expectations. The aim of this tutorial is to generate an algorithm based on black box trading, with all the necessary elements for evaluation. That is a first post of several, in order to explore the problems, features of...

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Blackbox trading Strategy using Rapidminer and R

January 23, 2011
By
Blackbox trading Strategy using Rapidminer and R

This my first post in 2011. this post has cost me a bit more than usual, but I hope it meets expectations. The aim of this tutorial is to generate an algorithm based on black box trading, with all the necessary elements for evaluation. That is a first post of several, in order to explore the problems, features of...

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Hard drive occupation prediction with R – part 2 – Getting the probability distribution

Hard drive occupation prediction with R – part 2 – Getting the probability distribution

On the first article, we saw a quick-and-dirty method to predict disk space exhaustion when the usage pattern is rigorously linear. We did that by importing our data into R and making a linear regression.In this article we will see the problems with that method, and deploy a more robust solution. Besides robustness, we will also see how we can generate...

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Learning R through baseball: sab-R-metrics

January 21, 2011
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Learning R through baseball: sab-R-metrics

The words "statistics" and "baseball" are often found near each other, but there's a lot more to statistics than dividing the number of hits by the number of swings to get a batting average. And there's a lot more to sabermetrics -- the statistical analysis of baseball -- than averages, too. Many baseball fans are also stats geeks (and...

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Submit your talks for the R user conference

January 19, 2011
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useR! 2011, the annual R user conference supported by the R Foundation for Statistical Computing, will be held this year in the United Kingdom at the University of Warwick (which is located, oddly enough, in Coventry). Last year's conference featured dozens of presentations on R's use in pretty much every domain of analysis, science and research. There were talks...

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Review: R in a Nutshell by Joseph Adler

January 17, 2011
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Review: R in a Nutshell by Joseph Adler

Summary: Very comprehensive and very useful, but not good for a beginner. Great book though – definitely has a place on my bookshelf. Reference: Adler, J., 2010, R in a Nutshell, O’Reilly, Sebastopol, CA, 611 pages  O’Reilly Link After reviewing a book about R designed for beginners (see my previous post) I thought I’d step

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In case you missed it: December Roundup

January 17, 2011
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In case you missed them, here are some articles from December of particular interest to R users. A Facebook employee created a beautiful visualization of social connections around the world, which made a lot of news on the Web. The creator, Paul Butler, explained how he did it using R. With sponsorship from Revolution Analytics, the R/Finance conference in...

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Webinar on Portfolio Design, Optimization and Stability Analysis, Jan 26

January 14, 2011
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We're very excited to host a new webinar from some of the leading researchers in portfolio design: Diethelm Würtz and Mahendra Mehta for the Rmetrics Association. This webinar will give an overview on current and recent developments and tools for portfolio design, optimization and stability analysis with the R/Rmetrics software environment. This webinar will review content available in the...

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Remove all rows of an R dataframe

January 13, 2011
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Remove all rows of an R dataframe

I should have probably figured this out a long time ago, but as I get deeper into programming with R, I am finding the need to remove all rows from a dataframe.  I was making this alot harder than it had to be. your.df<- your.df Replace your.df with, your dataframe and you are good

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