4101 search results for "GIS"

First step on GIS with R

January 17, 2016
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First step on GIS with R

The PM 2.5 checker written by R has been working nicely for me.  I put a shortcut icon of this small script on my desktop PC, to check the air … Continue reading →

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R in Insurance: Registration and abstract submission opened

January 12, 2016
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R in Insurance: Registration and abstract submission opened

Following the successful 3rd R in Insurance conference in Amsterdam last year, we return to London this year.The registration for the 4th conference on R in Insurance on Monday 11 July 2016 at Cass Business School has opened. This one-day conference will focus again on applications in insurance and actuarial science that...

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Data Science Radar – Technologist Profile

December 14, 2015
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Data Science Radar – Technologist Profile

    by Mark Sellors, Mango Solutions @sellorm  Mark Sellors from Mango took the Data Science Radar Challenge and his dominant skill was a Technologist, so we asked him a few questions. 1.  Tell us a bit about your background … Continue reading →

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Register for Hadley Wickham’s Master R Developer Workshop – San Francisco

December 9, 2015
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Register for Hadley Wickham’s Master R Developer Workshop – San Francisco

Are you ready to upgrade your R skills?  Register soon to secure your seat. On January 28 and 29, 2016, Hadley Wickham will teach his popular Master R Developer Workshop at the Westin San Francisco Airport.  The workshop is offered only 3 times a year and the San Francisco class is already nearly 50% full. This

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Script And Workflow For Batch Geocoding Millions Of Address With PostGIS Tiger Geocoder

November 19, 2015
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Script And Workflow For Batch Geocoding Millions Of Address With PostGIS Tiger Geocoder

SummaryI discussed all the problem I met, approaches I tried, and improvement I achieved in the Geocoding task. There are many subtle details, some open questions and areas can be improved. The final working script and complete workflow are hosted in github.

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Geocoding 18 million addresses with PostGIS Tiger Geocoder

November 17, 2015
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SummaryThis post discussed the background, approaches, windows and linux environment setup for my Geocoding task. See more details about the script and workflow in next post.

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updating the GISS dataset

November 6, 2015
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updating the GISS dataset

Introduction I was watching a video of David Suzuki being interviewed on Australian TV, and there were some questions about the “pause” in temperature in the GISS dataset. I thought I’d like to check for myself, and reasoned that I may as well update the giss dataset in the ocedata R package. As always seems to be the case, the data format is changed...

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My QGIS Processing Scripts at GitHub

October 22, 2015
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This is probably my shortest post ever.All my QGIS processing scripts (R and Python) and models that I already blogged about, plus some extra are now available at GitHub.

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Introduction to Logistic Regression with R

October 6, 2015
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Introduction to Logistic Regression with R

In my previous blog I have explained about linear regression. In today’s post I will explain about logistic regression.         Consider a scenario where we need to predict a medical condition of a patient (HBP) ,HAVE HIGH BP or NO HIGH BP, based on some observed symptoms – Age, weight, Issmoking, Systolic...

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Predicting creditability using logistic regression in R: cross validating the classifier (part 2)

September 15, 2015
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Predicting creditability using logistic regression in R: cross validating the classifier (part 2)

Now that we fitted the classifier and run some preliminary tests, in order to get a grasp at how our model is doing when predicting creditability we need to run some cross validation methods.Cross validation is a model evaluation method that does not u...

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