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Wolfram Language Optimization Numerical Computation

FindMaximum failing

ash ash

Posted 11 years ago

Hi all.. I am trying to find the maximum point for the following graph.. it is visually clear that it is around 1300.. I was wondering whats the command for it... Is it FindMaximum [{Cp[[Delta]]}, {[Delta], 0, 1}]]? i tried this and it dint work .. Any help would help.. Thanks in advance..

POSTED BY: ash ash

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ash ash

Posted 11 years ago

Sorry in the first hand. yes! i missed to paste the [Mu]m , i was only not sure with the command to be used. may be i should read the posting guidelines.. i am only learning mathematica. is there a rule that i cannot ask basic or east questions in this forum?

POSTED BY: ash ash

ash ash

Posted 11 years ago

POSTED BY: ash ash

W. Craig Carter

W. Craig Carter, MIT

Posted 11 years ago

POSTED BY: W. Craig Carter

ash ash

Posted 11 years ago

POSTED BY: ash ash

W. Craig Carter

W. Craig Carter, MIT

Posted 11 years ago

Hello Ash Ash, Perhaps I misunderstand your question. I am assuming that you are no longer interested in a maxima. To find the value of an expression for a particular value of a parameter, you can use slash-dot with a rule: expr = a Cos[ b x] expr /. a -> 2 expr /. {a -> 2, x -> 3} expr /. {a -> 2, b -> 3, x -> Pi} More information can be found here: tutorial/ApplyingTransformationRules

POSTED BY: W. Craig Carter

ash ash

Posted 11 years ago

thanks! that was clarifying! :)

POSTED BY: ash ash

W. Craig Carter

W. Craig Carter, MIT

Posted 11 years ago

Hello, While at risk of encouraging those who do not read the posting guidelines or the documentation.... Pn = 40; \[Mu]p = 0.2; cp = -Pn ( 0.066 (56250.` \[Delta]^2 + 24496.` \[Delta] \[Mu]m - 18723.` \[Delta]^2 \[Mu]m - 480.` \[Mu]m^2 + 540.` \[Delta] \[Mu]m^2 - 135.` \[Delta]^2 \[Mu]m^2))/(\[Delta] (168.` \[Delta] - 9.` \[Delta]^2 + 160.` \[Mu]m - 180.` \[Delta] \[Mu]m + 45.` \[Delta]^2 \[Mu]m)) (\[Delta] - 1)/\[Mu]p temp = cp /. \[Mu]m -> 1 Plot[temp, {\[Delta], 0, 1}] FindMaximum[temp, \[Delta]] with hopes that I can get someone to look at my CUDA questions on community.... sigh. WCC

Hello, While at risk of encouraging those who do not read the posting guidelines or the documentation....

Pn = 40;
\[Mu]p = 0.2;
cp = -Pn (
  0.066 (56250.` \[Delta]^2 + 24496.` \[Delta] \[Mu]m - 
     18723.` \[Delta]^2 \[Mu]m - 480.` \[Mu]m^2 + 
     540.` \[Delta] \[Mu]m^2 - 
     135.` \[Delta]^2 \[Mu]m^2))/(\[Delta] (168.` \[Delta] - 
     9.` \[Delta]^2 + 160.` \[Mu]m - 180.` \[Delta] \[Mu]m + 
     45.` \[Delta]^2 \[Mu]m)) (\[Delta] - 1)/\[Mu]p
temp = cp /. \[Mu]m -> 1
Plot[temp, {\[Delta], 0, 1}]
FindMaximum[temp, \[Delta]]

with hopes that I can get someone to look at my CUDA questions on community.... sigh. WCC

POSTED BY: W. Craig Carter

Daniel Lichtblau

Daniel Lichtblau, Wolfram Research

Posted 11 years ago

POSTED BY: Daniel Lichtblau

ash ash

Posted 11 years ago

I pasted the picture, only to show what i really want to ask. in this case the syntax to be used.. 3) is there even a rule that i cannot ask basic or easy questions in this forum?? in that case, it is a pity for beginners .