Create Compound Variable

A compound variable is a dedicated variable generally made from two or three components. It can be used to:

• store rotations or gradients which can be used to define local parameters in kriging with local anisotropies. Rotation and gradient vectors can be built from independent variables respectively in Create Rotation or Create Gradient. Or they can be directly computed in Local Anisotropies.
• define a sub-block grid (i.e. a grid made from cells of irregular size). A sub-block grid is defined by a points data table and a vector variable defining the size DU/DV(/DW) of each cell along each direction U/V(/W) with a potential rotation (global to the grid). In this case the vector variable is built in Create Block Definition from independent variables (previously imported). Variables require to be defined with a Length Unit Class.