Open terminal, navigate to project folder, assume Heroku CLI and Git installed heroku loginheroku git:remote -a ‘name of heroku project’ If using a database: heroku addons:create heroku-postgresql:hobby-devheroku pg:psql
Rank results by the values in a column: SELECT *, RANK() OVER (PARTITION BY column1 ORDER BY column2 DESC) AS rnkFROM table Restrict the number of results to return only the top or bottom X results SELECT *, RANK() OVER… Continue Reading →
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 →