stereo.algorithm.spa_track.SpaTrack.get_velocity_grid

SpaTrack.get_velocity_grid(spatial_key=None, grid_num=50, smooth=0.5, density=1.0)[source]

Convert cell velocity to grid velocity for streamline display.

The visualization of vector field borrows idea from scTour: https://github.com/LiQian-XC/sctour/blob/main/sctour.

Parameters:

  • spatial_key (Optional[str]) – The key to get position information of cells, by default, the data.spatial_key will be used.

  • grid_num (int) – the number of grids, defaults to 50

  • smooth (float) – The factor for scale in Gaussian pdf, defaults to 0.5

  • density (float) – grid density, defaults to 1.0

Returns:

A tuple containing the embedding and unitary displacement vectors in grid level.