5132 search results for "git"

Displaying time series, spatial, and space-time data with R is available for pre-order

Displaying time series, spatial, and space-time data with R is available for pre-order

Two years ago, motivated by a proposal from John Kimmel, Executive Editor at Chapman & Hall/CRC Press, I started working …Sigue leyendo →

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Writing a book with a little help from Emacs and friends

Writing a book with a little help from Emacs and friends

This post provides technical details about the making of my book “Displaying time series, spatial, and space-time data with R”, …Sigue leyendo →

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Intraday data

March 9, 2014
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Intraday data

In the Intraday Backtest post I showed an example of loading and working with Forex Intraday data from the FXHISTORICALDATA.COM. Recently, I came across another interesting source of Intraday data at the Bonnot Gang site. Please note that you will have to register to get access to the Intraday data; the registration is free. Today,

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Dora’s Choice

March 9, 2014
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Dora’s Choice

Arithmetic is being able to count up to twenty without taking off your shoes (Mickey Mouse) On her last mission, Dora The Explorer sails down the Amazon river to save her friend Isa The Iguana from Swiper The Fox claws. After some hours of navigation, Dora sees how the river divides into 3 branches and

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A question of model uncertainty

A question of model uncertainty

It has been several months since my last post on classification tree models, because two things have been consuming all of my spare time.  The first is that I taught a night class for the University of Connecticut’s Graduate School of Business, introducing R to students with little or no prior exposure to either R or programming.  My hope...

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Tidying “messy data” in R

March 9, 2014
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I watched Hadley Wickham's excellent talk on tidy data and tidy tools, and decided to use this as an opportunity to learn about a few of his R packages. (In case you're unfamiliar with Hadley, he is well-known for his contributions to the R ecosystem, ...

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colorRampPaletteAlpha() and addalpha() – helper functions for adding transparency to colors in R

March 8, 2014
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colorRampPaletteAlpha() and addalpha() – helper functions for adding transparency to colors in R

colorRampPalette is a very useful function in R for creating colors vectors to use as the palette, or to pass as an argument to a plotting function; however, a weakness lies in that it disregards the alpha channel of the colors passed to it when creating the new vector.I have also found that working with the alpha channel in...

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Poverty and Crime in Mexico – Interactive Map

March 6, 2014
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Poverty and Crime in Mexico – Interactive Map

How safe is Mexico? That is a frequent question people ask me. There is even  website about it  (see this blog post). So I’ve decided it was time to go one step further and make an interactive map (click here for full screen) of poverty and crime in Mexico. The objective was to see which municipalities have The post

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Using APIs in Python: a quick example

March 4, 2014
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Using APIs in Python: a quick example

Python has an extremely intuitive and straightforward way of dealing with APIs, and makes it simple for people like you or me to access and retrieve information from databases. Before I quickly describe how to use APIs in Python, maybe we should begin with: What is an API? API (Application Programming Interface): An API is a software intermediary

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Some statistics about the book

March 4, 2014
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Some statistics about the book

The release date for Zumel, Mount “Practical Data Science with R” is getting close. I thought I would share a few statistics about what goes into this kind of book. “Practical Data Science with R” started formal work in October of 2012. We had always felt the Win-Vector blog represented practice and research for such Related posts:

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