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Minimise error: Variable domain should be Reals or Integers?

Oliver Blombery
Posted 1 year ago

Hi, any idea how to resolve this error?

Minimize::vdom: Variable domain {ps} should be either Reals or Integers.

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The code

Minimize[(svccoef*ststddev*
Sqrt[dcproclt + transportlt + storeproclt]) 
+ (Ceiling[(stfreq*ads), ps]/2) + minpres, 
1 <= ps <= 48, Element[{ps}, Integers], {ps}] // N
POSTED BY: Oliver Blombery
4 Replies
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Multiple constraints on the variable (here, ps) are written with And (&&) between them.

A minor change gets your code to work.

In[1]:= Minimize[{(1.64*1*Sqrt[3 + 1 + 1]) + (Ceiling[(7*5), ps]/2) + 6, 
          1 <= ps <= 48 && Element[ps, Integers]}, ps]
Out[1]= {27.1672, {ps -> 1}}
POSTED BY: Adiba Shaikh

That fixed it, thanks so much!
POSTED BY: Oliver Blombery

Hi, I've changed all the variables to specific values to remove any unknowns. I've also cleared ps as you mentioned. Still coming up with the same error:. The code is now:

Minimize[(1.64*1*Sqrt[3 + 1 + 1]) + (Ceiling[(7*5), ps]/2) + 6, 
   1 <= ps <= 48, 
   Element[{ps}, Integers], 
   {ps}] // N;

Minimize::vdom
POSTED BY: Oliver Blombery

It would help if you could provide the values of all of the other symbols used in the expression. Are you sure ps is not already set to some value? Try ClearAll[ps].
POSTED BY: Rohit Namjoshi
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