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#### A.4.4.8 Spectrogram Layer Control

This control is experimental. It is missing some important features, and the interface may be changed in a future version.

The Spectrogram Layer Control () plots a spectrum at successive (usually, but not necessarily, regularly-spaced) points in a time series. It is only available for the Time Plot Window; you can add one of these controls to the stack by using the Add Spectrogram Control () button in the control panel toolbar, or the corresponding item in the Layers menu.

Time Plot window with a Spectrogram layer

This control has only one layer-specific tab, Data, described below. The Zone tab is described in Appendix A.4.14.1.

To control the colour map used to represent the spectral values, use the Aux fixed control.

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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk