Reading Waveforms from Files

1. Use the Read Waveforms from File VI.
   • For a single-waveform file, the VI returns the waveform.
   • For a multi-waveform file, the VI returns an array of waveform data. You can display this data in a multi-plot graph.
2. Optional: Read specific information about the waveform or waveforms.

   Option	Description
   Retrieve a subset of the waveform at a specified time or index	Use the Get Waveform Subset VI.
   Extract waveform attributes	Use the Get Waveform Attribute function.

   Note To use these capabilities on specific waveforms within a file that contains multiple waveforms, first use the Index Array function to isolate the individual waveforms in the file.

Reading a Waveform from a Single-Waveform File

The VI in Figure 37. Graphing a Subset of a Waveform performs the following operations:

• Reads a waveform from a single-waveform file
• Returns the first 100 elements of the waveform
• Plots the subset of the waveform to a graph

Reading Specific Waveforms from a Multi-Waveform File

The VI in Figure 38. Graphing Specific Waveforms from a Multi-Waveform File accesses a file that includes multiple waveforms. The Index Array function reads the first and third waveforms in the file and plots them on two separate waveform graphs.