The function calculates the formula scale * x + offset and displays the result as the new axis scale based on a axis given by the diagram name and axis type (x,y,z).
The field function has to be added to axis title which shows the new scale. Example: The y-axis of the diagram Diagram1 displays power in KW. To add an horsepower axis create a new diagram and insert the following text into the y axis title:
@f{linkaxisscale(Diagram1, y, 1.36, 0)}Power in HP
id-1686311