Minimizing a multivariable function

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imren bayil
imren bayil 2018-3-17
评论： Star Strider 2018-3-17
function b=three_var(v)
x=v(1);
y=v(2);
z=v(3);
b=(x-10)^2+(y-4)^2+(z-0.9)^2+3*(1-x*y*z)^2
v=[5,5,5];
a=fminsearch(@three_var,v)
I would like to find minumum multivariable function in matlab
f(x,y,z)=(x-10)^2+(y-4)^2+(z-0.9)^2+3*(1-x*y*z)^2 (x0,y0,z0)=(5,5,5)
ı tried above solution but it has error can anybody help me please

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回答（1 个）

Star Strider
Star Strider 2018-3-17
Your code works for me as you posted it. (I added an end as the last line of the function, because I have a test function I use to test functions, and that requires the end call.)
With that one change, I got these results:
a =
9.997810194891304
3.994471169491158
0.025222197590888
  2 个评论
imren bayil
imren bayil 2018-3-17
when I run this code,it writing Error using Untitled (line 2) Not enough input arguments.
Star Strider
Star Strider 2018-3-17
I have no idea what you are doing.
Save your function in its own file in your MATLAB search path as three_var.m. Then run these lines from your script:
v=[5,5,5];
a=fminsearch(@three_var,v)

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