hyperspy._components.arctan module

class hyperspy._components.arctan.Arctan(A=1.0, k=1.0, x0=1.0, module=['numpy', 'scipy'], **kwargs)

Bases: Expression

Arctan function component.

$$f(x)=A\cdot \arctan \left[k(x-x_0)\right]$$

Variable	Parameter
$A$	A
$k$	k
$x_0$	x0

Parameters:

• A (float) – Amplitude parameter. $\underset{x\to -\mathrm{\infty }}{lim}f(x)=-A$ and $\underset{x\to \mathrm{\infty }}{lim}f(x)=A$

• k (float) – Slope (steepness of the step). The larger $k$, the sharper the step.

• x0 (float) – Center parameter (position of zero crossing $f(x_0)=0$).