a populationPyramid needs exactly two halves...

Warnings reference › chart:pyramid:halves

Identifier

chart:pyramid:halves

Raised by

Charts

Since

1.85.0

What happened

A populationPyramid mirrors two halves about a central axis, but its binding produced a different number: the series column held one value or more than two, or fewer than two measures were given. With one half it draws that half alone; with more than two it draws the first two.

The fix

Split y by a series column holding exactly two values (the first is drawn on the left), or name the two columns: measures: [{ col: 'male' }, { col: 'female' }]. Filter the grid to two values if the column holds more.

The smallest fix

createChart({ grid, container, type: 'populationPyramid', x: 'age', measures: [{ col: 'male' }, { col: 'female' }] });

Reference

Covered in full at the API reference.