Difference between revisions of "AnyWave:TimeFrequency"

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You must first select one or more channels before launching the plug-in. To select channels you should click on the corresponding view once, to set focus on it. Then, press and hold the Selection key and clic on channels you want to select. You can also click and hold the mouse button and then drag to easily select several channels at once.<br />
 
You must first select one or more channels before launching the plug-in. To select channels you should click on the corresponding view once, to set focus on it. Then, press and hold the Selection key and clic on channels you want to select. You can also click and hold the mouse button and then drag to easily select several channels at once.<br />
 
Once at least one channel is selected, just launch the Time Frequency plugin using the Processes Menu.
 
Once at least one channel is selected, just launch the Time Frequency plugin using the Processes Menu.
 
 
As shown by the picture below, ensure that a second view is active by selecting Split Horizontically. Click on the Eye button to set the channels type filters. The Time Frequency plug-in will create channels of type '''Other''', so be sure that the Other type is set to be displayed in the corresponding view.
 
 
 
[[File:TFCapture2.png|center|1000px]]
 
[[File:TFCapture2.png|center|1000px]]
 
==Launch the plug-in from the Menu==
 
[[File:Image_2.png|center]]
 
  
 
==Setting parameters for the plug-in==
 
==Setting parameters for the plug-in==
[[File:Image_3.png|center]]
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[[File:TFCapture3.png|center]]
  
 
There are few parameters to set:
 
There are few parameters to set:
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When all is ready, click on OK to launch the process.
 
When all is ready, click on OK to launch the process.
 
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=T/F Plugin=
In our example, we have selected only one channel, so one Time/Frequency representation will be computed and one Other channel will appear in the bottom view.
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[[File:TFCapture4.png|center]]
[[File:Image_4.png|center|600px|Time/Frequency channel TF_A125 appears in bottom view]]
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The plugin is shown with the computed T/F. It is possible to recompute the T/F using different settings and/or change the display options.<br />
 
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You may navigate within the data file and see that the T/F representation is automatically updated.
 
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Notice the widget that appeared in the bottom right corner of the main window. This indicates that a process is currently active and Idle. In our case, it is the Time/Frequency process.
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The process will be updated by AnyWave any time the user browse the traces, providing a synchronous representation of the Time/Frequency.
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==Enhance Time/Frequency rendering==
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The default rendering of the time/frequency representation may not suit your needs.
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It is possible to change some options simply by moving the mouse over the time/frequency display:
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[[File:Image_5.png|center]]
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Note the widgets that appears on the top left part of the display:
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* Size is a slider that allows to change the size of the time/frequency representation.
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* Gain is a slider that allows to change the gain applied to values.
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* Norm. is the type of normalization applied to values. By Default no normalization is applied. Change to choose a normalization to be applied.
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* Freq. Scale is the scale applied to frequencies. Change to suit your needs.
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* Colormap is the current colormap used. Jet is used by default but other colormaps can be applied.
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The moving cursor following the mouse indicates the frequency's value in Hz
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Latest revision as of 15:34, 26 April 2016

How to use the plug-in

You must first select one or more channels before launching the plug-in. To select channels you should click on the corresponding view once, to set focus on it. Then, press and hold the Selection key and clic on channels you want to select. You can also click and hold the mouse button and then drag to easily select several channels at once.
Once at least one channel is selected, just launch the Time Frequency plugin using the Processes Menu.

TFCapture2.png

Setting parameters for the plug-in

TFCapture3.png

There are few parameters to set:

  • Oscillations is a parameter used in the computation of the Wavelet.
  • Min. Freq. is the minimum frequency for computation. Default is 5Hz which means the time/frequency representation will start at 5Hz.
  • Max. Freq. is the maximum frequency for computation. (The higher the longer)
  • Step or Pas is the step in Hertz for computation. Default is 1Hz which means that the computation will be done with a 1Hz step between minimum and maximum frequencies.
  • Baseline area : This parameter allows using a marked area as a baseline. A Time/Frequency representation of the marked area will be computed and used as a baseline for the other computation.

The default is set to No Baseline so the selected signals will be computed with no baseline.
To use a baseline, first mark an area using the Add Marker feature of AnyWave and then relaunch Time/Frequency process.

When all is ready, click on OK to launch the process.

T/F Plugin

TFCapture4.png

The plugin is shown with the computed T/F. It is possible to recompute the T/F using different settings and/or change the display options.
You may navigate within the data file and see that the T/F representation is automatically updated.