4098 search results for "gis"

Logistic Regression Regularized with Optimization

February 25, 2017
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Logistic Regression Regularized with Optimization

Logistic regression predicts the probability of the outcome being true. In this exercise, we will implement a logistic regression and apply it to two different data sets. The file ex2data1.txt contains the dataset for the first part of the exercise and ex2data2.txt is data that we will use in the second part of the exercise. Related Post

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Moving largish data from R to H2O – spam detection with Enron emails

February 17, 2017
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Moving largish data from R to H2O – spam detection with Enron emails

Moving around sparse matrices of text data - the limitations of as.h2o This post is the resolution of a challenge I first wrote about in late 2016, moving large sparse data from an R environment onto an H2O cluster for machine learning purposes. In th...

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Creating a Mailing List in QGIS and R

February 15, 2017
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Creating a Mailing List in QGIS and R

My day job as a real estate agent requires a myriad of skills, ranging from accounting to negotiation to business analysis.  Frequently (about every three months) I whip out my marketing skills to advertise my business.  This time I decided to send out postcards to an entire neighborhood in which I had sold homes recently. … Continue...

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Releasing RQGIS 0.2.0

January 23, 2017
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Releasing RQGIS 0.2.0

Today we are happy to announce a new version of RQGIS! RQGIS establishes an interface between R and QGIS, i.e. it allows the user to access the more than 1000 QGIS geoalgorithms from within R.

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Cost Weighted Logistic Loss

December 15, 2016
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Cost Weighted Logistic Loss

The problem of weighting the type 1,2 errors on binary classification came up in a forum I visit. My solution: Here we can see the different loss behaviours We will try to classify the Virginica species from the iris dataset   And now the loss functions:

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Register today for rstudio::conf 2017!

December 15, 2016
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Register today for rstudio::conf 2017!

On the other side of the Holidays are sunny January days in Florida, home of rstudio::conf 2017 and the exclusive Wizarding World of Harry Potter experience reserved for our guests! The speakers and sponsors are set and the Gaylord Resort is ready. The entire RStudio team, led by masters of ceremony Hadley Wickham and Joe Cheng,

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Time is running out – register for Hadley Wickham’s Master R in Melbourne!

November 23, 2016
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Time is running out – register for Hadley Wickham’s Master R in Melbourne!

Want to Master R? There’s no better time or place than Hadley Wickham’s workshop on December 12th and 13th at the Cliftons in Melbourne, VIC, Australia. Register here: https://www.eventbrite.com/e/master-r-developer-workshop-melbourne-tickets-22546200292   (Note: Prices are in $US and VAT is not collected) Discounts are still available for academics (students or faculty) and for 5 or more attendees

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Binomial Logistic Regression.

October 2, 2016
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Binomial Logistic Regression.

I’m officially a Kaggler. Cut to the good ol’ Titanic challenge. Ol’ is right – It’s been running since 2012 and ends in 3 months! I showed up late to the party. Oh well, I guess it’s full steam ahead from now on. The competition  ‘Machine Learning from Disaster’ asks you to apply machine learning to analyse and…

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RQGIS 0.1.0 release

August 15, 2016
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RQGIS 0.1.0 release

We proudly announce the release of RQGIS! RQGIS establishes an interface between R and QGIS, i.e. it allows the user to access the more than 1000 QGIS geoalgorithms from within R.

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Yet Another Post on Logistic Regression

July 21, 2016
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Yet Another Post on Logistic Regression

Everyday statisticians, analysts and data enthusiasts perform data analysis for different purposes. But when it comes to presenting analyses to wider audience, the good work is not the complex one with big words. It is the one that highlights interesting relations, answers business questions or predict outcomes, and explain all that in the simplest way through data visualization or...

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