Any help would be great! Thanks MATLAB comes with a built-in function mean. In s

Question

Any help would be great! Thanks

MATLAB comes with a built-in function mean. In science application, we often need to compute weighted arithmetic mean (wam) of numbers in the array x. The function is defined as where xk (k=1:n) is the variable value and wk (k=1:n) is the weight. Write MATLAB function y=wam(w,x), which returns the weighted arithmetic mean. Given an example of how your function is used. Your program should return error messages if the lengths of array x and w are different or if any value of w is negative. (There is no need to use loops in this problem.)

Explanation / Answer

%Sample input

%x=[1 2 3]

%w=[1 1 1]

%output=2

function [output] = wam(w,x)

size_w=size(w,2);

size_x=size(x,2);

  

if(isempty(find(w<0))==0)

disp('w contains negative values');

end

if(size_w~=size_x)

disp('Error in size');

else

numerator=x*w';

denominator=sum(w);

output=numerator/denominator;

end

end

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