Convenience function for returning a 1 dimensional ndarray of values
from X, layers[k], or obs.
Made for convenience, not performance. Intentionally permissive about
arguments, for easy iterative use.
- Parameters:
- k
Key to use. Should be in obs_names or var.columns.
- layer
str | None (default: None) What layer values should be returned from. If None, X is used.
- Return type:
ndarray
- Returns:
A one dimensional ndarray, with values for each var in the same order
as var_names.
