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sd.scantable.smooth - Function

5.1.2 Smooth the spectra
Description

Smooth the spectrum by the specified kernel (conserving flux).

The user should specify a type of smoothing kernel. Supported types are ’hanning’ (default), ’gaussian’, ’boxcar’, ’rmedian’, or ’poly’. The width of the kernel in pixel can be specified as width argument. For hanning this is ignored otherwise it defauls to 5 pixels. For ’gaussian’ it is the Full Width Half Maximum. For ’boxcar’ it is the full width. For ’rmedian’ and ’poly’ it is the half width. The order argument is an optional parameter for ’poly’ kernel (default is 2), to specify the order of the polnomial. It is ignored by all other kernels.

You can verify and decide whether you apply the fit result or not, if plot argument is True. In that case, you have to answer ’y’ or ’n’ for each spectra so that setting True is not recommended for large dataset.

If insitu is True, or insitu is None and sd.rcParams[’insitu’] is True, the method will not return the result, but apply operation on this scantable.

Arguments





Inputs

kernel

The type of smoothing kernel

allowed:

string

Default:

’hanning’

width

The width of the kernel in pixels

allowed:

float

Default:

5.0

order

Order of the polynomial for ’poly’ kernel

allowed:

integer

Default:

2

plot

Plot the fit and the residual

allowed:

bool

Default:

False

insitu

If False a new scantable is returned

allowed:

bool

Default:

None





Returns
scantable

Example


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