There are many places in Sailwave where the user can enter an expression. In each context the user will be provided with a list of variables that can be used within the expression, but the general form of the expression is always the same.
The following operators can be used:-
Modulus division %
Standard precedence rules apply; i.e. ^ has precedence over /*% which have precedence over +-. Always use parenthesis if you are not sure.
The following functions can be used:-
Absolute value – abs(x).
Truncate to integer value – int(x).
Natural logarithm – loge(x).
Base 10 logarithm log10(x).
Round to decimal places dependant on y – round(x,y). E.g. round(x,1), round(x,0.01).
Square root – sqrt(x).
Example expressions in a context where the variables s,p and c are allowed:-
s s-p (s-p)/c p + 10*log10(p) - 1 p^3/c 101 + 1000 * log10(r) - 1000*log10(p) 101 + 1000 * log10(r/p) 89.5*(1 - 2.7183^(-(0.8 + 0.23*s)))*(s-p)/(s-1) + 10.5 1311 - 100*(r*p + 11)^(1/3)