3618 search results for "gis"

RStudio presents Essential Tools for Data Science with R

July 16, 2014
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RStudio presents Essential Tools for Data Science with R

The RStudio team recently rolled out new capabilities in RStudio, shiny, ggvis, dplyr, knitr, R Markdown, and packrat. The “Essential Tools for Data Science with R” free webinar series is the perfect place to learn more about the power of these R packages from the authors themselves. Click to learn more and register for one or

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Determine your Fitbit stride length using a GPS watch

July 15, 2014
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Determine your Fitbit stride length using a GPS watch

I have been carrying my Fitbit One for a little over two years with me and it keeps tracking my daily steps. It also tracks my distance covered by multiplying those steps using the stride length which you can either provide explicitly or implicitly setting your heights. In the winter of 2012 I bought my … Continue reading...

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Consistent naming conventions in R

July 15, 2014
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Consistent naming conventions in R

Naming conventions in R are famously anarchic, with no clear winner and multiple conventions in use simultaneously in the same package. This has been written about before, in a lucid article in the R Journal, a detailed exploration of names in R source code hosted on CRAN and general discussion on stackoverflow. Basically, there are 5 naming...

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Simple user interface in R to get login details

July 15, 2014
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Simple user interface in R to get login details

Occasionally I have to connect to services from R that ask for login details, such as databases. I don't like to store my login details in the R source code file, instead I would prefer to enter the my login details when I execute the code.Fortunately,...

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Guide to Machine Learning with R from InsideBigData

July 14, 2014
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InsideBigData has published a new Guide to Machine Learning, in collaboration with Revolution Analytics. As the name suggests, the Guide provides an overview of machine learning techniques, with a focus on implementation with the R language and (for big-data applications) Revolution R Enterprise. You can download the Guide here (email registration required), or for a quick overview of the...

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5 new R jobs (for July 14th 2014)

July 14, 2014
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r_jobs

This is the bimonthly R Jobs post (for 2014-07-14), based on the R-bloggers’ sister website: R-users.com. If you are an employer who is looking to hire people from the R community, please visit this link to post a new R job (it’s free, and registration takes less than 10 seconds). If you are a job seekers, please follow the links below to learn more and apply for your job of interest (or visit previous...

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R Notes: vectors

July 12, 2014
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  R is different from C family languages. It has a C syntax, but a Lisp semantics. Programmers from C/C++/Java world would find many usages in R adhoc and need to memorize special cases. This is because they use R from a C's perspective. R is a very...

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Item Response Theory and Item Information Exploration

July 10, 2014
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Item Response Theory and Item Information Exploration

In the following post I will map out some item information functions for item response theory (IRT) models using the common 3 parameter logistic model for binary responses. The model takes three parameters (obviously) which relate to the item features ...

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R Day at Strata NYC

July 8, 2014
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R Day at Strata NYC

RStudio will teach the new essentials for doing data science in R at this year’s Strata NYC conference, Oct 15 2014. R Day at Strata is a full day of tutorials that will cover some of the most useful topics in R. You’ll learn how to manipulate and visualize data with R, as well as

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analyze the demographic and health surveys (dhs) with r

July 8, 2014
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professors of public health 101 probably cite the results of the demographic and health surveys (dhs) more than all other data sources combined.  funded by the united states agency for international development (usaid) and administered by the tech...

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