+ calculates the sum of 2 values.
calculates the difference of 2 values.
* calculates the product of 2 values.
/ calculates the division of 2 values.

For example, given the following case fragment,

 

Cholesterol     7.3    5.6    6.1*
Triglyceride    0.8    1.1    1.8
HDL             2.2           0.5*

 

 

Triglyceride > HDL + 1.0

 

Triglyceride < Cholesterol – 4.0

 

Triglyceride > HDL * 3

 

Triglyceride > Cholesterol / 2

 

Note: Calculated Value attributes can be very useful in situations where it is necessary to consider complex operations on one or more attribute values.