The magnitude at this x, or null where the series has a position but no
reading.
A gap is not a zero. seaborn.pointplot pads a hue level missing from one
category so its estimate lines stay the same length, and a producer that
meets a break in a series has nowhere else to put it. Number(null) is
0, which would make the gap sound like a real low point, let it be
reached as the row's minimum, and pull the range every other point's pitch
is scaled against — the same trap toBarValue was written for (#925).
null rather than a non-finite number because the payload has to survive
JSON.parse: json.dumps writes NaN and Infinity as bare tokens that
are legal JavaScript and invalid JSON, and a producer emitting one stops
the chart initialising at all (xability/py-maidr#427).
OptionalzOptionallabelOrdinal level name announced in place of the raw numeric y, for a chart
whose y axis is a category rather than a magnitude — a hypnogram's sleep
stages, a Likert response, a severity grade. y stays numeric because it
drives sonification, braille and the min/max range, so the human-readable
name has to travel alongside it.
An empty string counts as absent, so a producer that emits '' for an
unnamed level gets the numeric announcement rather than a blank one.
Omitting it entirely is the right shape for a continuous y.
OptionalcensoredA subject left the study at this time without the event happening.
Censoring marks are drawn as ticks on the curve rather than as steps, because censoring does not change the estimate -- it changes how much of the curve is still supported by data. A reader who cannot tell a censored time from an ordinary one cannot tell a flat tail backed by two hundred subjects from one backed by three.
OptionalyLower bound of the confidence band at this time, when the chart draws one.
OptionalyUpper bound of the confidence band at this time, when the chart draws one.
One point of a Kaplan-Meier survival curve.
The curve itself is a step function -- survival holds until an event drops it -- so this is a StepPoint with the two things a survival figure carries that a step chart does not.