Functions with Multiple Results

There is a special form of assignment statement that is only used when the right-hand side contains a call to a function with multiple results. The left-hand side contains a parenthesized, comma-separated list of variables receiving the results from the function call. A function with n results needs n receiving variables on the left-hand side.

function f input Real x; input Real y; output Real r1; output Real r2; output Real r3; algorithm r1 := x; r2 := y; r3 := x*y; end f;
model fCall Real x[3]; Real a, b, c; equation (a, b, c) = f(1.0, 2.0); (x[1], x[2], x[3]) = f(3.0, 4.0); end fCall;

1 Calling the function f

We can call f with some input values and see what outputs it returns.

f(2.5, 3)
f(3, 4)
f(1.0, 2.0)

2 Simulation of the fCall model

We simulate fCall in the interval from 0 to 1, then we can look at the values of the variables.

simulate (fCall )
{val(a,0), val(b,0), val(c,0)}
plot( {x[1],x[2],x[3]} )