Content-type: text/html Manpage of imspect

imspect

Section: User Commands (1)
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NAME

imspect - Make spectrum from a Miriad image.  

PERSON RESPONSIBLE

mchw  

CATEGORIES

image analysis and display.  

DESCRIPTION

IMSPECT makes an spectrum of the velocity or frequency axis of a Miriad image. The spectrum is integrated, or averaged over the region specified for the other image axes. The output spectrum can be plotted and/or written out as an ascii file for further analysis.  

PARAMETERS

in
The input image. vxy and xyv images are acceptable inputs. No default.
region
Rectangular region of image to be averaged. E.g.
  % imspect  region=relpix,box(-4,-4,5,5)(10,50) for an xyv
image, makes a spectrum of image planes 10 to 50 integrated over the center 10 x 10 pixels in the x-y plane. For a vxy image where the x and y size is 128x128, the corresponding region=box(10,61,50,70)(61,70). Box refers image axes 1 and 2 for either vxy or xyv images. The default is the entire image.
xaxis
The x-axis can be plotted as 'channel' or the units in the image. The default which is whatever units are in the header.
yaxis
If 'average' then the pixels enclosed in the x-y area specified are averaged. If 'sum' they are summed and normalized if the units are known. Default is 'average'
yrange
Y-axis range for plot. The default is to self-scale.
hann
Hanning smoothing length (an odd integer < 15). The default is no smoothing (hann = 1).
options
List of minimum match task enrichment options. 1deriv Take 1-sided derivative of spectrum before plotting
        and after Hanning smoothing. Useful for Zeeman enthusiasts.
2deriv Take 2-sided derivative of spectrum before plotting. curve Plot the spectrum joining up the dots instead of the
        default step-plot.
device
Standard PGPLOT device. See the help on "device" for more information.
log
Write spectrum to this ascii file. Default is no output file.
comment
A one-line comment which is written into the logfile.


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

This document was created by man2html, using the manual pages.
Time: 18:35:38 GMT, July 05, 2011