Colormaps (Sound and Vibration Measurement Suite)
December 2007
NI Part Number:
372416A-01
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The Colormap allows you to display the results of order analysis or transient analysis on a customized intensity graph with a rainbow color scale. You can use the Colormap to display 3D results using colors to represent the third dimension. You also can add frequency or order lines to indicate locations of specific frequencies or order components on the Colormap. To use a Colormap, locate the Colormap on the Sound & Vibration controls palette and place the Colormap indicator on the front panel window. You then can wire the appropriate parameter of a VI or function to the Colormap on the block diagram. The following figure shows a sample Colormap.
The Colormap is an XControl that includes properties you can access manually by right-clicking the graph on the front panel window or programmatically by using the Property Node on the block diagram. You can use the properties to set characteristics such as the width and color of the cursor lines.
You can use the Display VIs to convert a Waterfall graph to a Colormap, and convert a Colormap to a Waterfall graph.
Some Sound and Vibration VIs return colormap data directly, as shown in the following figure.
This example uses the OAT Spectral Map VI to compute the spectral map of an analog waveform signal. The Colormap instance of the OAT Spectral Map VI returns the spectral map data directly to a Colormap.
Refer to the Color Map (Offline) example VI in the labview\examples\Order Analysis\Color Map directory for an example of using the Colormap.