pmesh.window module¶

class pmesh.window.Affine(ndim, scale=None, translate=None, period=None)[source]¶

Bases: object

Defines an affine Transformation, used by ResampleWindow.

Parameters:	translate : array_like, in integer mesh units. period : array_like in integer mesh units. scale : factor that multiples on position to obtain mesh units.

rescale(amount)[source]¶: Returns a new Affine where the scale is multipled by amount.

shift(amount)[source]¶: Returns a new Affine where the translate is shifted by amount. Amount is in integer mesh units, as translate.

class pmesh.window.ResampleWindow(kind, support=-1)[source]¶

Bases: pmesh._window.ResampleWindow

paint(real, pos, hsml=None, mass=None, diffdir=None, transform=None)[source]¶

paint to a field.

Parameters:

real : array_like: original values are preserved.
pos : array_like
mass : array_like or None: None for 1
hsml: array_like or None: scaling of the kernel. it is dimensionless; None for no scaling (default kernel support in grid units)
diffdir: int or None: direction for differentiation kernel. 0, 1, 2,… or None
transform: Affine: The Affine transformation from position to grid units.

readout(real, pos, hsml=None, out=None, diffdir=None, transform=None)[source]¶

readout from a field.

Parameters:

real : array_like
pos : array_like
hsml: array_like, or None: scaling of the kernel. it is dimensionless; None for no scaling (default kernel support in grid units)
out : array_like
mass : array_like or None: None for 1
diffdir: int or None: direction for differentiation kernel. 0, 1, 2,… or None
transform: Affine: The Affine transformation from position to grid units.

resize(support)[source]¶: Change the support of the window, returning a new window.