# nSide2nPix

Convert HEALPix resolution parameter to number of pixels on sphere

## Contents

- Syntax
- Input Arguments
- Return Arguments
- Description
- Example
- See also

## Syntax

    nPix = nSide2nPix(nSide)

## Input Arguments

    nSide    sub-divisions of facet sides. May be an array.

## Return Arguments

    nPix     size(nSide) number of pixels on sphere corresponding to nSide

## Description

HEALPix divides the sphere into 12 basic facets. Each facet is further divided into nSide sub-divisions for a total of 12*nSide^2 pixels.

## Example

    nSide = 2.^[1:4];
    nPix = nSide2nPix(nSide)

    nPix =

              48         192         768        3072

## See also

nPix2nSide

Copyright 2010-2011 Lee Samuel Finn. Terms of Use.