Today In Data Science – March 3rd 2017

The which() function will return the position of the elements(i.e., row number/column number/array index) in a logical vector which are TRUE.
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MongoDB is a NoSQL database program which uses JSON-like documents with schemas. It is free and open-source cross-platform database. MongoDB, top NoSQL database engine in use today, could be a good data storage alternative when analyzing large volume data. To use MongoDB with R, first, we have to download and install MongoDB Next, start MongoDB. […]Related PostFinding Optimal Number of ClustersAnalyzing the first Presidential DebateGoodReads: Machine Learning (Part 3)Machine Learning for Drug Adverse Event DiscoveryGoodReads: Exploratory data analysis and sentiment analysis (Part 2)
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Usually (mainly at work) I made a chart and when I present it nobody cares
about the style, if the chart comes from an excel spreadsheet, paint or
intercative chart, or colors, labels, font, or things I like to care.
That’s sad f…
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The acquisition of data in json structure presented in part 1 clearly showed the functioning of the client-server connection and the possibility to collect the data of interest. However, the json output appeares as a set of raw data in a json string that needs to be structured and stored in a suitable form for … Continue reading Web data acquisition: the structure of RCurl request (Part 2)
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After the short presentation here, let’s start using R seriously, i.e. with every day data. Being a frequent flyer, I often search the web to book flights and organise my trip. Being a data analyst, it’s natural to look at price data with interest, especially the most convenient, most expensive and “average” flights. Being a … Continue reading Web data acquisition: understanding RCurl from the command line (Part 1)
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This picture originally posted here covers the following topics:

Basic stack
Integrated platforms
Data formats
Large & out-of-memory data
As backend
in-database analytics

To zoom in, view picture …
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