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Astropy v8.0.0b1

  • Getting Started
  • User Guide
    • Constants (astropy.constants)
    • Units and Quantities (astropy.units)
    • N-Dimensional Datasets (astropy.nddata)
      • CCDData Class
      • Image Utilities
      • Utility Functions for Handling Bit Masks and Mask Arrays
      • Decorating Functions to Accept NDData Objects
      • NDData
      • Covariance
      • Mixins for Added Functionality
        • Slicing and Indexing NDData
        • NDData Arithmetic
        • I/O Mixin
      • Subclassing
      • Reference/API
    • Data Tables (astropy.table)
    • Time and Dates (astropy.time)
    • Time Series (astropy.timeseries)
    • Astronomical Coordinate Systems (astropy.coordinates)
    • World Coordinate System (astropy.wcs)
    • Models and Fitting (astropy.modeling)
    • Uncertainties and Distributions (astropy.uncertainty)
    • Overview of Astropy File I/O
    • High-level Unified File I/O
    • FITS File Handling (astropy.io.fits)
    • Text Tables (astropy.io.ascii)
    • VOTable Handling (astropy.io.votable)
    • ECVS, HDF5, Parquet, PyArrow CSV, YAML (astropy.io.misc)
    • Cosmological Calculations (astropy.cosmology)
    • Convolution and Filtering (astropy.convolution)
    • IERS data access (astropy.utils.iers)
    • Data Visualization (astropy.visualization)
    • Astrostatistics Tools (astropy.stats)
    • Masked Values and Quantities (astropy.utils.masked)
    • SAMP (Simple Application Messaging Protocol) (astropy.samp)
    • Configuration System (astropy.config)
    • I/O Registry (astropy.io.registry)
    • I/O Typing (astropy.io.typing)
    • Logging system
    • Python warnings system
    • Astropy Core Package Utilities (astropy.utils)
    • Environment variables
    • Astropy Glossary
  • Contributing
  • Project Details
  • User Guide
  • N-Dimensional Datasets (astropy.nddata)
  • Mixins for Added Functionality

Mixins for Added Functionality#

  • Slicing and Indexing NDData
    • Introduction
    • Slicing NDDataRef
    • Slicing NDDataRef Including Attributes
  • NDData Arithmetic
    • Introduction
    • Using Basic Arithmetic Methods
    • Using Arithmetic Classmethods
    • Advanced Options
  • I/O Mixin

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Covariance

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Slicing and Indexing NDData
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Updated on 21 May 2026 , built with Sphinx 9.1.0