优化两个参数的函数 [英] Optimization of a function of 2 parameters

问题描述

我的问题可能很常见，但是我不知道如何适应该问题的答案

My problem is probably common, but I don't know how to adapt the answer to this problem

我有一个带有两个参数(a，b)的函数F，我必须找到该函数的最大值.

I have a function F with two parameters (a,b) and I have to find the maximum of this function.

现在，我这样做:

optimization_of_F<-function(a,b){
  solution=c(0,0,0) #initialization 
  a=seq(0, 5, by=0.1)
  b=seq(0.1, 5, by =0.1)

  for (d in a){ 
    for (k  in b){ 
      if  ( F(d, k) > solution[1] )  {
        solution[1]= F(d,k)
        solution[2]= d
        solution[3]= k
      }  
    }     
  }
  return(solution)
}

但是这种方式太长了，我想对其进行优化.我该怎么办?

But this way is too long and I'd like to optimize it. How can I do that ?

推荐答案

尝试一下，其中F是您的函数，c(0,0)是初始猜测，c=2和d=pi/3是馈给F的固定参数，

Try this, where F is your function, c(0,0) an initial guess, c=2 and d=pi/3 are fixed parameters fed to F,

optim(c(0,0), F, c=2, d=pi/3)

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