Identifying derived variables

[markus-eberl]

Perhaps we need to exclude derived variables and concentrate only on primary measurements.

[markus-eberl]

According to Microtrac, these are the derived variables:
Derived variables

• Ellipse Ratio
• Ellipticity
• Compactness
• Roundness
• Ratios
  -- T/L aspect
  -- L/T
  -- W/L aspect
  -- L/W aspect
  -- T/W
  -- W/T
• Extent
• Sphericity
• Circularity
• Solidity
• Concavity
• Convection
• Surface area
• CHull surface Area
• Volume