3973 search results for "git"

Geometric Random graphs

March 18, 2013
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Some days ago a friend of mine asked how much i knew about graph-theory. My answer: nothing. Anyway, i was able to read a little bit on Random Geometric graphs, so i came with this little function to help visualize these things: There are some pretty...

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Callback functions for GUI widgets

March 18, 2013
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Callback functions for GUI widgets

Of all the things I dislike about R, one of the biggest is the fact that you can declare a function within the list of arguments to another function. I’ve gotten over it for very minor operations needed by things like lapply, but it can drive me bonkers elsewhere. One such instance is writing an

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column-store R or: how i learned to stop worrying and love monetdb

March 18, 2013
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"Combining R's sophisticated calculations and MonetDB's excellent data access performance is a no-brainer. One gets the best of two (open source) worlds with minimal hassle." - Dr. Hannes Mühleisen"oh wow that was fast like a cheetah with a jetpack or something" - anthony damicowhy try monetdb + ra speed test of four analysis commands on sixty-seven million...

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Veterinary Epidemiologic Research: GLM – Logistic Regression (part 2)

March 17, 2013
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Veterinary Epidemiologic Research: GLM – Logistic Regression (part 2)

Second part on logistic regression (first one here). We used in the previous post a likelihood ratio test to compare a full and null model. The same can be done to compare a full and nested model to test the contribution of any subset of parameters: Interpretation of coefficients Note: Dohoo do not report the

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Comparing ESPN’s, CBS’s, and NFL.com’s Fantasy Football Projections using R

March 17, 2013
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Comparing ESPN’s, CBS’s, and NFL.com’s Fantasy Football Projections using R

In the future, we will determine how to select the best possible team by maximizing your team's projected points and minimizing its downside risk.  But in order to do this, we will have to rely on our best guess of how many points each player will score.  We will use 2012 projections from ESPN, CBS, and NFL.com and actual...

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Ordinal Data

March 17, 2013
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Ordinal Data

I expect to be getting some ordinal data, from 5 or 9 point rating scales, pretty soon, so I am having a look ahead how to treat those. Often ANOVA is used, even though it is well known not to be ideal fro a statistical point of view, so that is the st...

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caretEnsemble Classification example

March 16, 2013
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caretEnsemble Classification example

Here's a quick demo of how to fit a binary classification model with caretEnsemble.  Please note that I haven't spent as much time debugging caretEnsemble for classification models, so there's probably more bugs than my last post.  ...

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Scholarly metadata in R

March 16, 2013
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Scholarly metadata in R

Scholarly metadata - the meta-information surrounding articles - can be super useful. Although metadata does not contain the full content of articles, it contains a lot of useful information, including title, authors, abstract, URL to the article, etc. One of the largest sources of metadata is provided via the Open Archives Initiative Protocol for Metadata Harvesting or OAI-PMH....

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Scholarly metadata in R

March 16, 2013
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Scholarly metadata in R

Scholarly metadata - the meta-information surrounding articles - can be super useful. Although metadata does not contain the full content of articles, it contains a lot of useful information, including title, authors, abstract, URL to the article, etc. One of the largest sources of metadata is provided via the Open Archives Initiative Protocol for Metadata Harvesting or OAI-PMH....

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Scholarly metadata in R

March 16, 2013
By
Scholarly metadata in R

Scholarly metadata - the meta-information surrounding articles - can be super useful. Although metadata does not contain the full content of articles, it contains a lot of useful information, including title, authors, abstract, URL to the article, etc. One of the largest sources of metadata is provided via the Open Archives Initiative Protocol for Metadata Harvesting or OAI-PMH....

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