IMP.EMageFit.sampling Namespace Reference

Utility functions to handle sampling. More...

Detailed Description

Utility functions to handle sampling.

Functions
def	create_sampling_grid_2d
	Creates a grid of positions (Vector3Ds), centered at 0. More...
def	create_sampling_grid_3d
	Creates a grid of positions (Vector3Ds), centered at 0. More...
def	get_orientations_nearby
	Rotations nearby a given one. More...

Function Documentation

def IMP.EMageFit.sampling.create_sampling_grid_2d	(		diameter,
			n_axis_points
	)

Creates a grid of positions (Vector3Ds), centered at 0.

The shape of the grid is a circle with diameter given by the parameter. n_axis_points is the number of points along an axis: The axis X Y will contain n_axis_points, equispaced. The other regions of space will contain only the points allowed by the size of the circle.

Definition at line 48 of file sampling.py.

def IMP.EMageFit.sampling.create_sampling_grid_3d	(		diameter,
			n_axis_points
	)

Creates a grid of positions (Vector3Ds), centered at 0.

Parameters

diameter	The shape of the grid is a sphere with this diameter.
n_axis_points	Number of points used alogn an axis for the grid. The axis X Y and Z will contain n_axis_points, equispaced. The other regions of space will contain only the points allowed by the size of the spere.

Definition at line 24 of file sampling.py.

def IMP.EMageFit.sampling.get_orientations_nearby	(		rotation,
			n,
			f
	)

Rotations nearby a given one.

They are got intepolating with the rotations of the uniform coverage. The parameter f (0 <= f <= 1) must be close to 0 to get orientations that are close to the given orientation

• Values from 0.1 (tight cluster) to 0.4 (loose) seem to be ok n - number of rotations requested

Definition at line 73 of file sampling.py.