5251 search results for "git"

Regression with multiple predictors

February 18, 2014
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Regression with multiple predictors

(This article was first published on Digithead's Lab Notebook, and kindly contributed to R-bloggers) Now that I'm ridiculously behind in the Stanford Online Statistical Learning class, I thought it would be fun to try to reproduce the figure on page 36 of the slides from chapter 3 or page 81 of the book. The result is a curvaceous surface...

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ggplot2: Cheatsheet for Visualizing Distributions

February 18, 2014
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ggplot2: Cheatsheet for Visualizing Distributions

In the third and last of the ggplot series, this post will go over interesting ways to visualize the distribution of your data.

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summary, annotation and visualization of genomic intervals with genomation package

February 18, 2014
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We have been working on new R package, genomation, that will help with the analysis of genomic intervals. Briefly, the package contains a collection of tools for visualizing and analyzing genome-wide data sets. The package works with a variet...

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AntWeb – programmatic interface to ant biodiversity data

February 18, 2014
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AntWeb – programmatic interface to ant biodiversity data

Data on more than 10,000 species of ants recorded worldwide are available through from California Academy of Sciences' AntWeb, a repository that boasts a wealth of natural history data, digital images, and specimen records on ant species from a large community of museum curators. Digging through some of the earliest announcements of AntWeb, I came across...

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Sochi 2014, R, D3.js

February 18, 2014
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Sochi 2014, R, D3.js

Ramnath design rCharts wich combine the powerful of open source R and D3.js.It give very pretty plots. Here is some code, using package XML to collect the data from http://www.sochi2014.com/fr/classement-des-medailles and plot a kind of sankey diagram ...

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Tutorials- Statistical and Multivariate Analysis for Metabolomics

February 17, 2014
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Tutorials- Statistical and Multivariate Analysis for Metabolomics

I recently had the pleasure in participating in the 2014 WCMC Statistics for Metabolomics Short Course. The course was hosted by the NIH West Coast Metabolomics Center and focused on statistical and multivariate strategies for metabolomic data analysis. A variety of topics were covered using 8 hands on tutorials which focused on: data quality overview

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A Delicious Analysis! (aka topic modelling using recipes)

February 17, 2014
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A Delicious Analysis! (aka topic modelling using recipes)

A few months ago, I saw a link on twitter to an awesome graph charting the similarities of different foods based on their flavour compounds, in addition to their prevalence in recipes (see the whole study, The Flavor Network and the … Continue reading →

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Changed and new things in the new version of rgbif, v0.5

February 17, 2014
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rgbif is an R package to search and retrieve data from the Global Biodiverity Information Facilty (GBIF). rgbif wraps R code around the to allow you to talk to GBIF from R. We just pushed a new verion of rgbif to cran - v0.5.0. Source and binary files are now available on CRAN. There are...

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demodulating time series

February 17, 2014
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demodulating time series

This posting shows how one might perform demodulation in R. It is assumed that readers are generally familiar tith the procedure. First, create some fake data, a carrier signal with period 10, modulated over a long timescale, and with phase drifting linearly over time. 1 2 3 4 5 6 7 8 9 10 period <- 10 fc <- 1/period fs <- 1 n...

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Probabilistic Momentum

February 16, 2014
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Probabilistic Momentum

David Varadi has recently discussed an interesting strategy in the Are Simple Momentum Strategies Too Dumb? Introducing Probabilistic Momentum post. David also provided the Probabilistic Momentum Spreadsheet if you are interested in doing computations in Excel. Today I want to show how you can test such strategy using the Systematic Investor Toolbox: The Simple Momentum

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