Chapter 12
Graphs and Charts
The 3D graphs use ActiveX technology and VIs that handle 3D representation. You can set properties for the 3D Graph Properties VIs to change behavior at run time, including setting basic, axes, grid, and projection properties. A surface plot uses x, y, and z data to plot points on the graph. The surface plot then connects these points, forming a three-dimensional surface view of the data. For example, you could use a surface plot for terrain mapping. When you select a 3D graph, LabVIEW places an ActiveX container on the front panel that contains a 3D graph control. LabVIEW also places a reference to the 3D graph control on the block diagram. LabVIEW wires this reference to one of the three 3D Graph VIs.
Waveform Data Type The waveform data type carries the data, start time, and ∆t of a waveform. You can create waveforms using the Build Waveform function. Many of the VIs and functions you use to acquire or analyze waveforms accept and return the waveform data type by default. When you wire a waveform data type to a waveform graph or chart, the graph or chart automatically plots a waveform based on the data, start time, and ∆x of the waveform. When you wire an array of waveform data types to a waveform graph or chart, the graph or chart automatically plots all the waveforms. Refer to Chapter 5, Creating a Typical Measurement Application, of the LabVIEW Measurements Manual for more information about using the waveform data type.
Digital Waveform Data Type The digital waveform data type carries start time, delta x, the data, and the attributes of a digital waveform. You can use the Build Waveform function to create digital waveforms. When you wire a digital waveform data type to the digital waveform graph, the graph automatically plots a waveform based on the timing information and data of the digital waveform. Wire the digital waveform data type to a digital data indicator to view the samples and signals of a digital waveform. Refer to Chapter 5, Typical Measurement Applications, of the LabVIEW Measurements Manual for more information about using the digital waveform data type.
LabVIEW User Manual
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