novaluefunction returns a matrix with type equal to "novalue". You can pass these matrices as arguments and you can check their type.
novaluerather than 0 so that an error will occur if the value is used.) If you enter
O-Matrix will attempt to find a file named Y.OMS and if it cannot it will respond with an error message saying that
function f(x) begin
x = 5
yis not defined. If you continue by entering
O-Matrix will respond
y = novalue