datasette-statistics

SQL statistics functions for Datasette

Installation

Install this plugin in the same environment as Datasette.

datasette install datasette-statistics

Usage

This plugin adds new SQL aggregate functions for use within Datasette:

• statistics_mean() for calculating the mean
• statistics_geometric_mean() for calculating the geometric mean (requires Python 3.8+)
• statistics_median() for calculating the median
• statistics_median_low() for calculating the low median
• statistics_median_high() for calculating the high median
• statistics_mode() for calculating the mode
• statistics_stdev() for calculating the sample standard deviation
• statistics_pstdev() for calculating the population standard deviation
• statistics_variance() for calculating the sample variance
• statistics_pvariance() for calculating the population variance

These all use the implementations from the Python statistics library.

Use them like this:

select statistics_mean(numeric_column) from mytable

Development

To set up this plugin locally, first checkout the code. Then create a new virtual environment:

cd datasette-statistics
python3 -mvenv venv
source venv/bin/activate

Or if you are using pipenv:

pipenv shell

Now install the dependencies and test dependencies:

pip install -e '.[test]'

To run the tests:

pytest