Problem with Minimization

Forum|Forum|10 years ago
June 18, 2016
5 replies
2443 views

Hello.. Apologies if this appears twice. I tried to post a question yesterday but it did not go through.

I am new to Mathcad so I am sure this is a trivial question for the experts.

I am building a program which manipulates a bunch of 1x400 vector arrays then integrates 2 of the arrays (Runge-Kutta). The final result of one of the integrations is then minimized with respect to frequency. No problem with minimizing a simple analytic function, but I must have a bad syntax here.

So I built a simple exercize below to make it easier to see my mistake.

Given

Where am I going wrong?

Thanks, Al

Physics

W

Werner_E

25-Diamond I

Its always better to attach the mathcad sheet,istself, not just a picture.

The error occurs becaus temp has to be a function depending on variable f. p(f):=....

In your case temp is a simple variable and so cannot be minimized.

WE

V

ValeryOchkov

24-Ruby IV

Use please min(P)=

R

RichardJ

19-Tanzanite

To minimize P with respect to f, P must be a function of f. That's easy enough to do, but then it's clear that there is no real minimum: as f increases, P decreases:

Maybe you just made the example too simple though, and your real function does have a minimum. In which case you can find it with minimize(P,f)

A

aclark-3

Author

1-Visitor

thanks everyone for your attempt to help. I am more confused, but am definitely trying (in my real program) to minimize P with respect to frequency. I realize that my practice example was pretty bad.

I will study your reponses, do some more homework, and return when I can ask a more intelligent question.

Best, Al