3276 search results for "map"

R Users, Meet Joyent Manta; Manta Users, Meet R

January 17, 2014
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When I joined Joyent last year, I jumped on the opportunity to make R work with Joyent Manta. If you are new to Joyent, we are the High-Performance Cloud Infrastructure Company. If you are new to data analytics, the R language is a rich open-source env...

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R Users, Meet Joyent Manta; Manta Users, Meet R

January 17, 2014
By

When I joined Joyent last year, I jumped on the opportunity to make R work with Joyent Manta. If you are new to Joyent, we are the High-Performance Cloud Infrastructure Company. If you are new to data analytics, the R language is a rich open-source env...

Read more »

Computing and visualizing LDA in R

January 15, 2014
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Computing and visualizing LDA in R

As I have described before, Linear Discriminant Analysis (LDA) can be seen from two different angles. The first classify a given sample of predictors to the class with highest posterior probability . It minimizes the total probability of misclassification. To compute it uses Bayes’ rule and assume that follows a Gaussian distribution with class-specific mean

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Hungarian RUG: lighting talks

January 13, 2014
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Hungarian RUG: lighting talks

The only Hungarian R User Group so far, the Budapest Users of R Network (BURN), with already more than 120 members, is hosting several lighting talks on the 15th of January (Wednesday): Bence Arató (BI Consulting): Who uses R? László Bodó: C++ calls in R Csaba Burger (Burg Analytics): Financial decisions with lme4  Gergely Daróczi (rapporter.net): A Pandoc writer in R Imre Kocsis (

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Statistical Interests in Large Cities

January 10, 2014
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Statistical Interests in Large Cities

I always thought that there were some kind of schools in statistics, areas (not to say universities or laboratories) where people had common interest in term of statistical methodology. Like people with strong interest in extreme values, or in Lévy Processes. I wanted to check this point so I did extract information about articles puslished in about 35 journals...

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Spatial clipping and aggregation in R

January 10, 2014
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Spatial clipping and aggregation in R

A common task in GIS is comparing the spatial extent of one layer with another. Say you have a load of points, some of which overlay a polygon layer. You are only interested in the points that intersect with the points. What do you do? Also, how can you aggregated-up the values contained in the points to correspond with the...

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Spatial clipping and aggregation in R

January 10, 2014
By
Spatial clipping and aggregation in R

A common task in GIS is comparing the spatial extent of one layer with another. Say you have a load of points, some of which overlay a polygon layer. You are only interested in the points that intersect with the points. What do you do? Also, how can you aggregated-up the values contained in the points to correspond with the...

Read more »

Instrumental Variables Simulation

January 9, 2014
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Instrumental Variables Instrumental variables are an incredibly powerful for dealing with unobserved heterogenity within the context of regression but the language used to define them is mind bending. Typically, you hear something along the lines of “an instrumental variable is a variable that is correlated with x but uncorrelated with...

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Instrumental Variables Simulation

January 9, 2014
By

Instrumental Variables Instrumental variables are an incredibly powerful for dealing with unobserved heterogenity within the context of regression but the language used to define them is mind bending. Typically, you hear something along the lines of “an instrumental variable is a variable that is correlated with x but uncorrelated with...

Read more »

How to use vectorization to streamline simulations

January 6, 2014
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How to use vectorization to streamline simulations

While grading some homework it became apparent that many of the idioms of R are not widely known and aren’t …Continue reading »

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