imager.setscales - Function

Description

The multiscale clean algorithm cleans an image on a number of different scales, decomposing the image into Gaussians of these scale sizes. This function allows the user to set the number of scales used (using the nscales method), or to directly control the sizes of the scales in pixels (using the uservector method). When using the nscales method, the scales are calculated using the following formula:

$\displaystyle \theta_{minor}^{}$ 10.0^{(i - N_scales/2)/2.0}

(1.3)

where is the fitted minor axis of the clean beam. The first value is zero.

Arguments

`scalemethod`	`in`	Method by which scales are set
		`Allowed:`	`String: 'nscales'\|'uservector'`
		`Default:`	`nscales`
`nscales`	`in`	Number of scales
		`Allowed:`	`Int`
		`Default:`	`5`
`uservector`	`in`	Vector of scale sizes in pixels to use
		`Allowed:`	`Vector of Doubles`
		`Default:`	`[0, 3, 10]`

Returns Bool

Example

- imgr.setscales(scalemethod='nscales', nscales=6);

Here we make six scales automatically using the method described above. Or we could manually choose the scales in pixel numbers as follows:

- imgr.setscales(scalemethod='uservector', uservector=[0,3,10,30]);

Note: 0 pixel is the delta function, so if one were to select scale 0 only it would be equivalent to a Hogbom clean.

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	`Package`	`synthesis`
	`Module`	`imager`
	`Tool`	`imager`