DataAxis

class gammapy.utils.nddata.DataAxis(nodes, name='Default', interpolation_mode='linear')

Bases: object

Data axis to be used with NDDataArray

Axis values are interpreted as nodes.

For binned data see BinnedDataAxis.

Parameters:

nodes : Quantity

Interpolation nodes

name : str, optional

Axis name, default: ‘Default’

interpolation_mode : str {‘linear’, ‘log’}

Interpolation behaviour, default: ‘linear’

Attributes Summary

interpolation_mode	Interpolation mode
nbins	Number of bins
nodes	Evaluation nodes
unit	Axis unit

Methods Summary

find_node(val)	Find next node
logspace(vmin, vmax, nbins[, unit])	Create axis with equally log-spaced nodes

Attributes Documentation

interpolation_mode

Interpolation mode

nbins

Number of bins

nodes

Evaluation nodes

unit

Axis unit

Methods Documentation

find_node(val)

Find next node

Parameters:

val : Quantity

Lookup value

classmethod logspace(vmin, vmax, nbins, unit=None, **kwargs)

Create axis with equally log-spaced nodes

if no unit is given, it will be taken from vmax, log interpolation is enable by default.

Parameters:

vmin : Quantity, float

Lowest value

vmax : Quantity, float

Highest value

bins : int

Number of bins

unit : UnitBase, str

Unit