CNiIviScopeMeasurement::IsWaveformElementInvalid

inline bool IsWaveformElementInvalid(
    double elementValue);

This function determines whether a value you pass from the waveform array is invalid. After the read and fetch waveform functions execute, each element in the waveform array contains either a voltage or a value indicating that the oscilloscope could not sample a voltage. The driver uses an IEEE defined NaN (Not a Number) value to mark as invalid each element in the waveform array for which the oscilloscope could not sample a voltage.

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