2366 search results for "map"

The R-Files: Hadley Wickham

September 21, 2010
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The R-Files: Hadley Wickham

"The R-Files" is an occasional series from Revolution Analytics, where we profile prominent members of the R Community. Name: Hadley Wickham Profession: Assistant Professor of Statistics, Rice University Nationality: New Zealand Years Using R: 10 Known for: Developing popular R packages including ggplot2, plyr, reshape; creator of crantastic.org; author of ggplot2: Elegant Graphics for Data Analysis An Assistant Professor...

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Data Mining in A Nutshell

September 20, 2010
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Data Mining in A Nutshell

# The following code may look rough, but simply paste into R or# a text editor (especially Notepad++) and it will look# much better.# PROGRAM NAME: MACHINE_LEARNING_R# DATE: 4/19/2010# AUTHOR : MATT BOGARD# PURPOSE: BASIC EXAMPLES OF MACHINE LEAR...

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R Function Reference

September 15, 2010
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R Function Reference

The R Function Reference is a mind map that I've created to help novice and intermediate R users perform common tasks and analyses.

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EmEditor Professional as an R script editor

September 11, 2010
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EmEditor Professional as an R script editor

R is not supported "out of the box" by EmEditor, so here's a few tips I've found for using it as a great editor for R.Code Syntax highlighting Executing R scripts and capturing outputUse ctags symbols to navigate files.If you create packages for CRAN or like neat code, you might like to use a macro to tidy it...

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Clipping a Surface By a Polygon

September 8, 2010
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Clipping a Surface By a Polygon

Background: A common function in standard GIS software enables users to create a raster surface and extract values or clip it based on a set of polygons. This may be used in cases where you want analysis to be constrained to within a town’s boundaries or a coastline. This tutorial will outline how to create

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Writing a Spatial Function: The Location Quotient

September 7, 2010
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Writing a Spatial Function: The Location Quotient

Background: In some cases it is necessary to conduct the same analysis multiple times on either the same or different data. In such circumstances it is worth writing a function to simplify the code. In this example the location quotient provides a simple calculation easily written in to a function. The location quotient (LQ) is

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Canterbury Earthquakes part II

September 7, 2010
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Canterbury Earthquakes part II

Since posting last night, there's been several more aftershocks, including several big ones. The total now stands (at 7:00pm) at 304 aftershocks, 70 greater than 4 on the Richter scale, 29 greater than 4.5, and 10 greater than 5. A couple of the fives ...

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Canterbury Earthquakes part II

September 7, 2010
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Canterbury Earthquakes part II

Since posting last night, there's been several more aftershocks, including several big ones. The total now stands (at 7:00pm) at 304 aftershocks, 70 greater than 4 on the Richter scale, 29 greater than 4.5, and 10 greater than 5. A couple of the fives ...

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Coastal

September 6, 2010
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Coastal

UPDATE: cce asked for a chart of coastal locations broken out by their SST component and their Land componement. That’s a little tricky, but once you figure out the mask logic its just addition and such.There are TWO masks: One mask contains ALL zeros, except for coast cells which are fraction of LAND.The other mask

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Competition: Data Visualization with ggplot2

September 3, 2010
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Competition: Data Visualization with ggplot2

The ggplot2 package for R is an amazing system for creating entirely new visualizations of data. It allows data analysts to tell a detailed, meaningful and yet easy-to-interpret story about complex and/or unusual data sets. To promote more data stories being told, ggplot2 author Hadley Wickham has organized a ggplot2 case study competition. Simply create a new visualization of...

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