R: Vectorising all the things

After my last post about finding the distance a date/time is from the weekend Hadley Wickham suggested I could improve…

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R: Time to/from the weekend

In my last post I showed some examples using R’s lubridate package and another problem it made really easy to…

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R: Cleaning up and plotting Google Trends data

I recently came across an excellent article written by Stian Haklev in which he describes things he wishes he’d been…

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R: Applying a function to every row of a data frame

In my continued exploration of London’s meetups I wanted to calculate the distance from meetup venues to a centre point…

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Spark: Write to CSV file

A couple of weeks ago I wrote how I’d been using Spark to explore a City of Chicago Crime data…

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Spark: Write to CSV file with header using saveAsFile

In my last blog post I showed how to write to a single CSV file using Spark and Hadoop and…

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Spark: Parse CSV file and group by column value

I’ve found myself working with large CSV files quite frequently and realising that my existing toolset didn’t let me explore…

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Neo4j: Cypher – Avoiding the Eager

  Although I love how easy Cypher’s LOAD CSV command makes it to get data into Neo4j, it currently breaks…

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Conceptual Model vs Graph Model

We’ve started running some sessions on graph modelling in London and during the first session it was pointed out that…

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