---
title: data (latest version)
description: API reference for qiskit_noise_learning.data in the latest version of qiskit-noise-learning
source: https://quantum.cloud.ibm.com/docs/en/api/qiskit-noise-learning/data
---

# Data

`qiskit_noise_learning.data`

Data containers.

## Classes

|                                                                                                                                                               |                                                                                                                                                                            |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`AggregatedObservableData`](/docs/api/qiskit-noise-learning/generated/data-aggregated-observable-data "qiskit_noise_learning.data.AggregatedObservableData") | Per-path estimates obtained by aggregating [`ObservableData`](/docs/api/qiskit-noise-learning/generated/data-observable-data "qiskit_noise_learning.data.ObservableData"). |
| [`LeveledData`](/docs/api/qiskit-noise-learning/generated/data-leveled-data "qiskit_noise_learning.data.LeveledData")                                         | Marker base class for data at a specific level of the analysis hierarchy.                                                                                                  |
| [`ModelData`](/docs/api/qiskit-noise-learning/generated/data-model-data "qiskit_noise_learning.data.ModelData")                                               | Results from fitting, backed by an xarray Dataset.                                                                                                                         |
| [`ObservableData`](/docs/api/qiskit-noise-learning/generated/data-observable-data "qiskit_noise_learning.data.ObservableData")                                | A collection of calculated expectation values.                                                                                                                             |
| [`RawData`](/docs/api/qiskit-noise-learning/generated/data-raw-data "qiskit_noise_learning.data.RawData")                                                     | Raw experimental outcome data associated with instruction sequences and classical registers.                                                                               |