NEGATIVE_HALF mode will give an axis with values from minus half the
sampling-rate (inclusive if length is even, exclusive otherwise) to
zero (inclusive).
SYMMETRIC mode will give an axis with values from minus half the
sampling-rate (inclusive if length is even) to plus half the
sampling-rate (exclusive).
Update axis maximum to reflect the maximum for all the CurveDatas
(whether or not exceeding the current axis maximum), but only within a
clipped axis range.
Update axis minimum to reflect the minimum for all the CurveDatas
(whether or not exceeding the current axis minimum), but only within a
clipped axis range.
Update axis minimum and maximum to reflect the extremas for all the
CurveDatas (whether or not exceeding the current axis extrema),
but only within a clipped axis range.
Update axis minimum and maximum to reflect the extremas for all the
CurveDatas (whether or not exceeding the current axis extrema), for the
complete axis range, with or without clipping.