Result of this code

Hello I've got problem with this part of my code:

for T2=T2ise:50:600
    h2-IdealAir(T2,'T','h')-w*(XSteam('hV_T',T2))
end

I want to find different values of this expression but I find

ans=
NaN
ans=NaN

I'd be glad if somebody could help me. result of functions IdealAir & XSteam is in char

Answer 1

[Star Strider]

I’m not quite sure what you’re doing. Perhaps:

h2 = IdealAir(T2,'T','h')-w*(XSteam('hV_T',T2))

might work a bit better (if that’s what you intend).

If T2 is a vector of variables to be used in your functions (as it seems to be), changing your loop to be:

T2=T2ise:50:600;
for k1 = 1:length(T2)
    h2(k1) = IdealAir(T2(k1),'T','h')-w*(XSteam('hV_T',T2(k1)));
end

would save the intermediate results of h2 (assuming it is a scalar). Save it as a matrix (adding a dimension) if h2 is a vector with constant lengths over iterations, or as a cell array if its length varies.