this is my code i am getting error with x = simulannealbnd(ObjectiveFunction,X0,ydata,lb,ub). can help me to resolve it

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ash 2017-8-5

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评论： ash 2017-8-7

function y = parameterized_objective(x,xdata)
      y =x(1)./((x(2).*(xdata.^(1+0.9)))+x(3).*(xdata.^(0.9))+1);
ydata=(0.2575./((xdata.^2)+(0.333.*xdata)+1));
xdata =[ 10.^(-5) 10.^(-4) 10.^(-3) 10.^(-2) 10.^(-1) 1]  ;
ObjectiveFunction = @(x)parameterized_objective(x,xdata);
 X0 = [0; 0; 0 ];
 lb = [0.2; 0.2;  0.2];
 ub = [1; 1; 1];
 x = simulannealbnd(ObjectiveFunction,X0,ydata,lb,ub)

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Walter Roberson 2017-8-5

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The simulannealbnd function does not expect ydata to be passed to it. You might need

ObjectiveFunction = @(x)parameterized_objective(x,xdata,ydata);
   x = simulannealbnd(ObjectiveFunction,X0,lb,ub)

having changed parameterized_objective to expect ydata

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Walter Roberson 2017-8-6

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Your code

function y = parameterized_objective(x,xdata)
    y =x(1)./((x(2).*(xdata.^(1+0.9)))+x(3).*(xdata.^(0.9))+1);

does not appear to have a need for ydata. Why was it that you were passing ydata to simulannealbnd ? Were you trying to do a fitting? If so then you should be using

xdata =[ 10.^(-5) 10.^(-4) 10.^(-3) 10.^(-2) 10.^(-1) 1]  ;
ydata=(0.2575./((xdata.^2)+(0.333.*xdata)+1));
parameterized_objective = @(x,xdata) x(1)./((x(2).*(xdata.^(1+0.9))) + x(3).*(xdata.^(0.9))+1);
ObjectiveFunction = @(x) sum((parameterized_objective(x,xdata) - ydata).^2);
X0 = [0; 0; 0 ];
lb = [0.2; 0.2;  0.2];
ub = [1; 1; 1];
x = simulannealbnd(ObjectiveFunction, X0, lb, ub)