A snapshot needs its date
An export records a view of information at a particular moment.
Notes on making sense of the things around us
The notebook.
An independent journal about tables, files, and the definitions that help data travel. Practical essays on collecting, organizing, and preserving useful context.
12 stories to explore
Energy and power answer different questions
The amount used and the rate of use describe different parts of the same task.
Examples shape the model’s task
The choice and labeling of training data influence what a system can learn.
A dictionary for your columns
Short definitions can prevent a table from depending on one person’s memory.
An estimate with visible assumptions
A rough calculation is easier to improve when its starting choices are written down.
The denominator changes the story
A percentage describes a relationship with a group that needs to be named.
A benchmark measures a defined task
A score becomes meaningful through the test that produced it.
Rounding without losing the point
The displayed precision should support the comparison a reader needs to make.
Timing an ordinary event
A stopwatch observation begins with agreeing on when the event starts and ends.
A dashboard with a question beside it
A useful collection of charts makes its purpose easier to see.
Show the range around an estimate
A central value may need another mark to describe how much remains uncertain.
No stories here just yet.
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A small idea to take with you
Explain one column
Find a field in a small table. Write its meaning, unit, and the rule for a missing value as though another person will use the file.