Scale¶

Scale(scale, *args, **kwargs)[source]¶

Return a ScaleBase instance.

Parameters

scale (ScaleBase, str, or tuple) – The axis scale specification. If a ScaleBase instance already, the input argument is simply returned. Otherwise, scale should be a string corresponding to one of the “registered” axis scales or axis scale presets (see below table).

If scale is a list or tuple and the first element is a “registered” scale name, subsequent elements are passed to the scale class as positional arguments.

Key	Class	Description
`'linear'`	`LinearScale`	Linear
`'log'`	`LogScale`	Logarithmic
`'symlog'`	`SymmetricalLogScale`	Logarithmic beyond finite space around zero
`'logit'`	`LogitScale`	Logistic
`'inverse'`	`InverseScale`	Inverse
`'function'`	`FuncScale`	Arbitrary forward and backwards transformations
`'sine'`	`SineLatitudeScale`	Sine function (in degrees)
`'mercator'`	`MercatorLatitudeScale`	Mercator latitude function (in degrees)
`'exp'`	`ExpScale`	Arbitrary exponential function
`'power'`	`PowerScale`	Arbitrary power function
`'cutoff'`	`CutoffScale`	Arbitrary piecewise linear transformations
`'quadratic'`	`PowerScale` (preset)	Quadratic function
`'cubic'`	`PowerScale` (preset)	Cubic function
`'quartic'`	`PowerScale` (preset)	Quartic function
`'db'`	`ExpScale` (preset)	Ratio expressed as decibels
`'np'`	`ExpScale` (preset)	Ratio expressed as nepers
`'idb'`	`ExpScale` (preset)	Decibels expressed as ratio
`'inp'`	`ExpScale` (preset)	Nepers expressed as ratio
`'pressure'`	`ExpScale` (preset)	Height (in km) expressed linear in pressure
`'height'`	`ExpScale` (preset)	Pressure (in hPa) expressed linear in height

Other Parameters

*args, **kwargs – Passed to the ScaleBase class.

Returns

matplotlib.scale.ScaleBase – A ScaleBase instance.