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componentlist.setspectrum - Function

	Package	synthesis
	Module	componentmodels
	Tool	componentlist

Change the spectrum of the component

Synopsis
setspectrum(which, type, index, log)

Description
The setspectrum function changes the spectrum of the specified components to the user specified spectrum.

The type argument defines what the sort of new spectrum to use. This can be either 'constant'or 'spectral index'. The parsing of this string is case insensitive.

If the spectrum type is 'constant' then the remaining arguments in this function are ignored. There are no other parameters needed to specify a constant spectrum.

But if the spectrum is 'spectral index', the index argument is needed to fully specify the spectrum. The index argument is a 4-element vector that contains the spectral index of the I, Q, U, & V polarizations. You should ensure that the reference frequency is set to the value you desire, using the setfreq function if you change to the spectral index shape.

Arguments

which		A vector of indices specifying the components to modify
		Allowed:	A vector with indices between 1 and the list length
		Default:	no default
type		The new spectrum type
		Allowed:	A string that is either 'constant or 'spectral index'
		Default:	Constant
index		The spectral indices
		Allowed:	A 4-element vector or real numbers
		Default:	[1,0,0,0]
log		Send a message to the logger
		Allowed:	Boolean
		Default:	T

Returns
nothing

Example

      include 'componentlist.g'
      cl := componentlist('centarusA.cl');
      cl.setspectrum(2:10, 'spectral index', [-0.5, 0, 0, 0]);
      print cl.getshape(2).index;

This example revises the model for Centaurus-A changing the spectral index of all the components in the left lobe. The output from the print statement is [-0.5 0 0 0]