Failing to define a function?

Question

I am trying to define a function and it apparently is not working. Here is my small working example:

f1 = Sqrt[0. + 2.09569 x^2 + 2.09569 y^2] 
K1 = 0.5;
f2 = Sqrt[30.7912 z^2 + 92.3941 v^2 + 30.7912 w^2 + 0.641399 t^2 + 74.5364 u^2 + 74.5364 m^2 + 0.641399 n^2 + 5.60933 x^2 + 0.277617 y^2]
K2 = 0.5;
fTotal[x_, y_, z_, v_, w_, t_, u_, m_, n_] := K1*f1 + K2*f2

And then I try to execute it and it does not work, for instance

fTotal[0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2]

What silly mistake am I making?

Simple replace := to =. We need not use := to define a function here. — cvgmt, Dec 29 '22 at 12:04

score 3 · Accepted Answer · answered Dec 29 '22 at 11:51

3

Try

fTotal[x_, y_, z_, v_, w_, t_, u_, m_, n_] := Evaluate[K1*f1 + K2*f2]

answered Dec 29 '22 at 11:51

Ulrich Neumann

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It worked, thank you! – Granger Obliviate Dec 29 '22 at 12:24
You're welcome! – Ulrich Neumann Dec 29 '22 at 12:40

Failing to define a function?

1 Answers1