3228 search results for "map"

Second NYC R classes(announcement and teaching experience)

January 20, 2014
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Second NYC R classes(announcement and teaching experience)

(The photo was from our first offering of R classes) We are going to offer our Data Science by R (beginner level) course again in February. The goal of this class is to get students to a point where they are self-sufficient in R, are proficient at analyzing data and can take these skills back to their full-time jobs....

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Visualization Series: Using Scatterplots and Models to Understand the Diamond Market (so You Don’t Get Ripped Off)

January 19, 2014
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Visualization Series: Using Scatterplots and Models to Understand the Diamond Market (so You Don’t Get Ripped Off)

My last post railed against the bad visualizations that people often use to plot quantitive data by groups, and pitted pie charts, bar charts and dot plots against each other for two visualization tasks.  Dot plots came out on top. … Continue reading →

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Using the plyr package

January 18, 2014
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Using the plyr package

Introduction The base R system provides lapply() and related functions, and the package plyr provides alternatives that are worth considering. It will be assumed that readers are familiar with lapply() and are willing to spend a few moments reading the plyr documentation, to see why the illustration here will use the ldply() function. The test task will be extraction of...

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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 »

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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