Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I want to define function in Mathematica on different way. Actually, if I already have functions a and b. How can I print the value in some point of function f but without defining functions a and b like f. I dont want to use this before a[x_]:=..., b[x_]:=... because a and b I obtained different and I can not change everything above in my code because of this.

  a = x;
  b = 2*x;

  f[x_] := a + b; 
  f[2]
share|improve this question
    
The output from this is 3 x. Isn't this what you want? It is not at all clear what you are asking. –  Verbeia Jan 16 '12 at 14:14
    
I want value of function in point 2, I need f[2], but I got the function –  Pipe Jan 16 '12 at 15:00
add comment

1 Answer

up vote 0 down vote accepted

Use Set instead of SetDelayed, like this:

a = x
b = 2*x

f[x_] = a + b
f[2]

Be sure to read the documentation on this to understand the implications of using one or the other.

share|improve this answer
    
@Szabolics Thanks, I will. I must put stronger question because of negative points. –  Pipe Jan 16 '12 at 15:50
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.