Imagine you have a data set ‘a’ which contains data from another data set ‘b’. You want to retrieve the data that exists in ‘a’ but not in b. This can be accomplished using a left outer join filtering on… Continue Reading →
Adobe Analytics Workspace makes it extremely easy for anyone to build decent looking, dynamic graphs and charts. Yet, if you are trying to visualise something that doesn’t fit within the constraints arbitrarily determined by Adobe, you’re going to have a… Continue Reading →
Cohort analysis is useful to track changes in groups of metrics over time. A good example is user engagement – do users who joined in January stay as engaged as users who joined in October? However, depending on how your… Continue Reading →
The following are notes from my readthrough of Maths and Stats for Web Analytics and Conversion Optimization by Himanshu Sharma, in no particular order: ROI, ROI, ROI You need 4 sets of data to calculate ROI: (1) Cost data (2)… Continue Reading →
Python is well known for its data science and analysis capabilities with packages such as Numpy, Matplotlib and Pandas. Each of these packages also offer a variety of graphing and visualisation tools, the majority of which is already very well… Continue Reading →
The below spreadsheet can be used to check key metrics before purchasing a property. All cells in orange are to be filled in with your own values. Everything else is calculated.
Easy SSH when your computer and your PI are on the same network (wifi) Mac/Linux: Open the terminal Windows: Install Putty Ensure the pi is turned on and connected to network Find the ip address of the pi SSH into… Continue Reading →
Terminal commands: Launch PostgreSQL terminal – psql Copy table from one db to another – pg_dump -t table_name copyfrom_db_name | psql copyto_db_name PSQL commands: List databases – \d List tables in current database – \dt List table structure – \d table_name List… Continue Reading →
Twitter sentiments – Looks up the 50 most recent tweets from any twitter user, classifies the sentiment of those tweets and outputs the result as a pie chart KS50 Finance – A simulated stock market portfolio tool, useful for learning the… Continue Reading →
The following are apps I’ve developed that currently only run from the command line. Many thanks to the excellent CS50 course for guidance with these. Caesar in C – Encrypts a user defined phrase using the caesar cypher method, and using a key… Continue Reading →