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# Frequency Domain Analysis¶

## Interface Overview¶

This interface is used to analyse the data collected on Muon instruments in the frequency domain. The interface can be accessed from the main menu of MantidWorkbench, in Interfaces → Muon → Frequency Domain Analysis. For sample datasets, please visit Muon - Downloads.

Analysis of the frequency spectrum can be achieved by clicking the fit function icon.

Advanced users can access additional features such as model analysis, raw plots and the fit script generator using Feature Flags.

The loading section is used to load data as well as to specify what the current runs of interest are.

Load Current Run This will load the latest run for the selected instrument. You must be connected to the ISIS data archive for this to work. It also currently only works on windows.

Run selection box This takes a comma seperated list of run numbers and loads them all in. You may also specify ranged of runs with a dash. For example 62260, 62270-3 will load 62260, 62270, 62271, 62273. This also specifies which runs are used by the rest of the GUI.

Browse This lets you browse locally for files to load.

Clear All This clears all the data from the current GUI.