Defines a physical value relative to a X axis and it is used as the DataType of the Value of XYArrayItemType. More...

#include <opcua_types.h>

Data Fields
OpcUa_Double	X
	Position on the X axis of this value.

OpcUa_Float	Value
	The value itself.

Detailed Description

Defines a physical value relative to a X axis and it is used as the DataType of the Value of XYArrayItemType.

Most analysers can produce values that can perfectly be represented with a float IEEE 32 bits, but they can position them on the X axis with an accuracy that requires double IEEE 64 bits. For example, the peak value in an absorbance spectrum where the amplitude of the peak can be represented by a float IEEE 32 bits, but its frequency position required 10 digits which implies the use of a double IEEE 64 bits.

The documentation for this struct was generated from the following file:

src/uastack/stackcore/opcua_types.h

Data Fields

Detailed Description