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ExpScale — UltraPlot documentation

class ExpScale(a=2.718281828459045, b=1, c=1, inverse=False)[source]

Bases: _Scale, ScaleBase

“Exponential scale” that performs either of two transformations. When inverse is False (the default), performs the transformation

\[Ca^{bx}\]

where the constants \(a\), \(b\), and \(C\) are set by the input (see below). When inverse is True, this performs the inverse transformation

\[(\log_a(x) - \log_a(C))/b\]

which in appearance is equivalent to LogScale since it is just a linear transformation of the logarithm.

Parameters:

• a (float, optional) – The base of the exponential, i.e. the \(a\) in \(Ca^{bx}\).

• b (float, optional) – The scale for the exponent, i.e. the \(b\) in \(Ca^{bx}\).

• c (float, optional) – The coefficient of the exponential, i.e. the \(C\) in \(Ca^{bx}\).

• inverse (bool, optional) – If True, the “forward” direction performs the inverse operation.

Attributes Summary

name

The registered scale name

Methods Summary

Attributes Documentation

name = 'exp'

The registered scale name

Methods Documentation

limit_range_for_scale(vmin, vmax, minpos)[source]

Return the range vmin and vmax limited to positive numbers.

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