879 search results for "how to import image file to R"

Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

July 28, 2013
By
Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

Introduction There was the EEEI Data Fusion Contest this spring. This year they wanted people to elaborate about hyper-spectral (142-bands imagery) and LiDAR data. The resolution of the data-set was about 5 m.  There were 2 nominations: best classification and  the best scientific paper.  I work with high-resolution imagery quite often, but classification is a very rear task for me...

Read more »

Processing ABI .fsa files in R, part 1.

April 11, 2013
By
Processing ABI .fsa files in R, part 1.

I’ve been working on a lot of AFLP data this winter. I’d really like to be able to do all the analysis in R, for a few reasons. First, it would mean no more fighting with GeneMapper, which is incredibly frustrating: it’s Windows-only, expensive, closed-source and painfully underpowered for the job. Second, presumably if I

Read more »

Create an R package from a single R file with roxyPackage

March 5, 2013
By
Create an R package from a single R file with roxyPackage

Documenting code can be a bit of a pain. Yet, the older (and wiser?) I get, the more I realise how important it is. When I was younger I said 'documentation is for people without talent'. Well, I am clearly loosing my talent, as I sometimes struggle to understand what I programmed years ago. Thus, anything that soothes the...

Read more »

Reshaping Horse Import/Export Data to Fit a Sankey Diagram

February 18, 2013
By
Reshaping Horse Import/Export Data to Fit a Sankey Diagram

As the food labeling and substituted horsemeat saga rolls on, I’ve been surprised at how little use has been made of “data” to put the structure of the food chain into some sort of context* (or maybe I’ve just missed those stories?). One place that can almost always be guaranteed to post a few related

Read more »

Find Duplicate Files Using R

December 28, 2012
By
Find Duplicate Files Using R

Find Duplicate Files This is a simple script to search a directory tree for all files with duplicate content. It …Continue reading »

Read more »

Florence Nightingale and the importance of Data Visualization

December 17, 2012
By
Florence Nightingale and the importance of Data Visualization

Florence Nightingale is held as a heroine for the British people because of her work during the Crimean War. However, she would not have been so fairly recognised if she had not been also a superb statistician: in a brilliant … Continue reading →

Read more »

Technical Analysis of Montana Voter Registration Files

September 18, 2012
By
Technical Analysis of Montana Voter Registration Files

By Earl F Glynn | Franklin Center This article shows how to analyze Montana voter registration files using R. The Montana Secretary of State sells two files of voter registration records for a fee of $1000: Statewide Voter File Voter History File The Montana Secretary of State provides information about the two files on this

Read more »

Amateur Mapmaking: Getting Started With Shapefiles

January 13, 2012
By
Amateur Mapmaking: Getting Started With Shapefiles

One of the great things about (software) code is that people build on it and out from it… Which means that as well as producing ever more complex bits of software, tools also get produced over time that make it easier to do things that were once hard to do, or required expensive commercial software

Read more »

Exercise in grImport

January 13, 2012
By
Exercise in grImport

Last week I used grImport for the first time. I decided to try perform another exercise using it. The task was to add voivodeship division of Poland.Standard R maps do not contain such a division. I have found it on r-forge in package  m...

Read more »

The R-Files: Martyn Plummer

August 17, 2011
By
The R-Files: Martyn Plummer

"The R-Files" is an occasional series from Revolution Analytics, where we profile prominent members of the R Community. Name: Martyn Plummer Occupation: Statistician at International Agency for Research on Cancer Nationality: British Years Using R: 16 Known for: Member of R core group; member of R Journal editorial board Martyn Plummer is a longtime contributor to the R community...

Read more »