Error with using fminsearch

Question

Berenice Oseguera 2019-12-22

0
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https://ww2.mathworks.cn/matlabcentral/answers/497689-error-with-using-fminsearch

评论： Berenice Oseguera 2019-12-23

I am working on finding the point that is the closest to 15 locations (minimum distance from all). The x- and y-coordinates are stored in 2 variables. I created the function and extracted the scalar variables from the vector but I am getting an error stating that there are not enough input arguments. The function definition and code are below:

function distance=mindistance(xv)
x=xv(1);
y=xv(2);
% extracting scaler variables from vector in fminsearch
sources = readtable('Data.xlsx','Sheet','PROJECT');
xcoordinates=table2array(sources(:,3));
ycoordinates=table2array(sources(:,4));
distance=sqrt(((x-xcoordinates).^2)+((y-ycoordinates).^2));
end

point to start with for fminsearch

xvg=[-2000 1500];
[xvmin,minD]=fminsearch(mindistance,xvg);

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Answer 1

Walter Roberson 2019-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/497689-error-with-using-fminsearch#answer_407358

编辑：Walter Roberson 2019-12-22

在 MATLAB Online 中打开

For one definition of "minimum distance from all":

function [xvmin, minD] = mindistance_driver
  sources = readtable('Data.xlsx','Sheet','PROJECT');
  xcoordinates = sources{:,3};
  ycoordinates = source{:,4};
  
  xvg=[mean(xcoordinates), mean(ycoordinates)];
  [xvmin, minD]=fminsearch( @(x) mindistance(x, xcoordinates, ycoordinates), xvg);
end
function distance = mindistance(xv, xcoordinates, ycoordinates)
    x=xv(1);
    y=xv(2);
    distance = sum( sqrt(((x-xcoordinates).^2)+((y-ycoordinates).^2)) );
end