Explain™ Control Language > Library Routines > Curve classes > class CPIV

Description

Extract a single data item from a Cpiv object.

The data item is taken from the ith data point and the jth data column. If no data have been taken, the returned value is NIL.

DataValue = Cpiv.DataValue(PointNum, ColNumber)

PointNum	INDEX	Point number, zero-based. If PointNum is out of range, a value from the last acquired point is returned.
PointNum	NIL	Always return a value from the last acquired point.
ColNumber	INDEX	A code identifying the column to be used: •CPIV_T = Time •CPIV_Vf = Applied Voltage •CPIV_Vu = Uncompensated Voltage •CPIV_Im = Measured Current •CPIV_Sig = Signal sent to Control Amp •CPIV_Ach = Measured Aux Channel Voltage
DataValue	REAL	The returned value.
DataValue	NIL	No data acquired yet.