Formula
This operator evaluates an arbitrary mathematical equation on a persample basis on the echogram data. Enter the formula through the Formula page of the Variable Properties dialog box.
Echoview accepts multiple operands of the following data types as input:
 Angular position
 Boolean
 Linear
 Multibeam angular position
 Multibeam boolean
 Multibeam magnitude
 Multibeam Sv
 Multibeam TS
 Multibeam unspecified dB
 Power dB
 Sv
 TS
 Unspecified dB
Settings
The Formula Variable Properties dialog box pages include (common) Variable Properties pages and these operator pages:
Operands page
Formula page
Setting 
Description 
Result Type 
Allows you to override the output type for the formula. Notes:

Edit Formula 
Click to create or edit a mathematical formula. 