pix.CMBDataFrame: HEALPix pixel indices from 'CMBDataFrame'

In frycast/rcosmo: Cosmic Microwave Background Data Analysis

HEALPix pixel indices from CMBDataFrame

Description

If new.pix is unspecified then this function returns the vector of HEALPix pixel indices from a CMBDataFrame. If new.pix is specified then this function returns a new CMBDataFrame with the same number of rows as cmbdf, but with pix attribute new.pix. Thus, new.pix must have length equal to nrow(cmbdf).

Usage

## S3 method for class 'CMBDataFrame'
pix(x, new.pix, ...)

Arguments

x	A CMBDataFrame.
new.pix	Optional vector of pixel indices with length equal to nrow(x).
...	Unused arguments.

Value

The vector of HEALPix pixel indices or, if new.pix is specified, a new CMBDataFrame.

Examples

## First download the map
# downloadCMBMap(foreground = "smica", nside = 1024)
# df <- CMBDataFrame("CMB_map_smica1024.fits", sample.size = 800000)
# pix(df)

df <- CMBDataFrame(nside = 16, sample.size = 10, ordering = "nested")
pix(df)

frycast/rcosmo documentation built on Oct. 11, 2022, 5:21 p.m.