Blog Archives

R and Solr Integration Using Solr’s REST APIs

November 19, 2013
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R and Solr Integration Using Solr’s REST APIs

Solr is the most popular, fast and reliable open source enterprise search platform from the Apache Luene project.  Among many other features, we love its powerful full-text search, hit highlighting, faceted search, and near real-time indexing. &nb...

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Simulating Map-Reduce in R for Big Data Analysis Using Flights Data

June 14, 2013
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Simulating Map-Reduce in R for Big Data Analysis Using Flights Data

At datadolph.in, we are constantly crunching through large amounts of data.  We are designing unique and innovative ways to process large datasets on a single node and use distributed computing only when single node computing become...

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Pull Yahoo Finance Key-Statistics Instantaneously Using XML and XPath in R

October 29, 2012
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Pull Yahoo Finance Key-Statistics Instantaneously Using XML and XPath in R

This two-part blog post I published a day ago required key-stats from Yahoo Finance for all the companies in the control group I created for my research.  I wanted all the key-stats pulled, arranged in a data-frame and then present them side-...

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If You are a R Developer, Then You Must Try SAP HANA for Free.

May 23, 2012
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This is a guest blog from Alvaro Tejada Galindo, my colleague and fellow R and SAP HANA enthusiast.  I am thankful to Alvaro for coming and posting on "AllThingsR".Are you an R developers? Have ever heard of SAP HANA? Would you like to test SAP HANA for free?SAP HANA is an In-Memory Database Technology allowing developers to analyze big data in real-time.Processes that...

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Big Data, R and SAP HANA: Analyze 200 Million Data Points and Later Visualize in HTML5 Using D3 – Part III

May 2, 2012
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Big Data, R and SAP HANA: Analyze 200 Million Data Points and Later Visualize in HTML5 Using D3 – Part III

Mash-up Airlines Performance Data with Historical Weather Data to Pinpoint Weather Related DelaysFor this exercise, I combined following four separate blogs that I did on BigData, R and SAP HANA.  Historical airlines and weather dat...

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Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize in HTML5 Using D3 – Part II

April 25, 2012
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Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize in HTML5 Using D3 – Part II

In my last blog, Big Data, R and SAP HANA: Analyze 200 Million Data Points and Later Visualize Using Google Maps, I analyzed historical airlines performance data set using R and SAP HANA and put the aggregated analysis on Google Maps.  Undoub...

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Getting Historical Weather Data in R and SAP HANA

April 19, 2012
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For many of my latest data blogs, I needed historical weather data to perform data mash-ups to pin-point the cause.  For example, for my continued exploration into the airlines/airports historical data using SAP HANA and R, I wanted to find out wh...

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Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize Using Google Maps

April 11, 2012
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Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize Using Google Maps

Technologies: SAP HANA, R, HTML5, D3, Google Maps, JQuery and JSONFor this fun exercise, I analyzed more than 200 million data points using SAP HANA and R and then brought in the aggregated results in HTML5 using D3, JSON and Google Maps APIs.  Th...

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Tracking SFO Airport’s Performance Using R, HANA and D3

March 22, 2012
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Tracking SFO Airport’s Performance Using R, HANA and D3

This is my first introduction to D3 and I am simply blown away.  Mike Bostock (@mbostock), you are genius and thanks for creating D3!  With HANA, R, D3, HTML5 and iPad, and you got yourself a KILLER combo!I have been burning my midnight oil o...

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Geocode and reverse geocode your data using, R, JSON and Google Maps’ Geocoding API

March 20, 2012
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Geocode and reverse geocode your data using, R, JSON and Google Maps' Geocoding APITo geocode and reverse geocode my data, I use Google's Geocoding service which returns the geocoded data in a JSON. I will recommend that you register with Google Maps A...

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