dodal.devices.util.lookup_tables

All the public methods in this module return a lookup table of some kind that converts the source value s to a target value t for different values of s.

Functions

energy_distance_table(lookup_table_path)	Returns a numpy formatted lookup table for required positions of an ID gap to provide emission at a given beam energy.
linear_interpolation_lut(s_values, t_values)	Returns a callable that converts values by linear interpolation of lookup table values.
parse_lookup_table(filename)	Parse a generic lookup table with a number of columns >= 2 and return a list in column major order of the values in it.

async dodal.devices.util.lookup_tables.energy_distance_table(lookup_table_path: str) → ndarray

Returns a numpy formatted lookup table for required positions of an ID gap to provide emission at a given beam energy.

Parameters:

lookup_table_path (str) – Path to lookup table

Returns:

Lookup table

Return type:

ndarray

dodal.devices.util.lookup_tables.parse_lookup_table(filename: str) → list[Sequence]

Parse a generic lookup table with a number of columns >= 2 and return a list in column major order of the values in it.

Parameters:

filename (str)

Return type:

list[Sequence]

dodal.devices.util.lookup_tables.linear_interpolation_lut(s_values: Sequence, t_values: Sequence) → Callable[[float], float]

Returns a callable that converts values by linear interpolation of lookup table values.

If the value falls outside the lookup table then the closest value will be used.

Parameters:

• s_values (Sequence)

• t_values (Sequence)

Return type:

Callable[[float], float]