get.fwhm: Get PSF FWHM in pixels
In AngusWright/LAMBDAR: Measure galaxy fluxes from an arbitrary FITS image using input aperture locations and dimensions
get.fwhm R Documentation
Get PSF FWHM in pixels
Description
Returns the pixel Full Width Half Max of an input image matrix
Usage
get.fwhm(zdist)
Arguments
zdist
numeric (n,m) array; image for which FWHM is desired
Details
The function determines the full width at half max of the input image, by searching outwards from the image maxima.
Value
numeric; value of the FWHM in pixels
Author(s)
Angus H Wright ICRAR
angus.wright@icrar.org
See Also
measure.fluxes, flux.measurements
Examples
#Load LAMBDAR
library(LAMBDAR)
#Make Gaussian data: stdev 5 pix
sd<-5
x<-matrix(-10:10,21,21,byrow=TRUE)
zdist<-matrix(exp(-1*(t(x)^2/(2*sd^2)+x^2/(2*sd^2))),21,21)
print(paste(2*sqrt(2*log(2))*sd,"~",get.fwhm(zdist)))
AngusWright/LAMBDAR documentation built on May 12, 2022, 1:49 a.m.
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| get.fwhm | R Documentation |
Get PSF FWHM in pixels
Description
Returns the pixel Full Width Half Max of an input image matrix
Usage
get.fwhm(zdist)
Arguments
zdist |
numeric (n,m) array; image for which FWHM is desired |
Details
The function determines the full width at half max of the input image, by searching outwards from the image maxima.
Value
numeric; value of the FWHM in pixels
Author(s)
Angus H Wright ICRAR angus.wright@icrar.org
See Also
measure.fluxes, flux.measurements
Examples
#Load LAMBDAR library(LAMBDAR) #Make Gaussian data: stdev 5 pix sd<-5 x<-matrix(-10:10,21,21,byrow=TRUE) zdist<-matrix(exp(-1*(t(x)^2/(2*sd^2)+x^2/(2*sd^2))),21,21) print(paste(2*sqrt(2*log(2))*sd,"~",get.fwhm(zdist)))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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