WHAT'S THE WRONG IN MY CODE?

   function [MLE] = RiskMetrics(data)
  sigma2 = zeros(length(data),1);
  sigma2(1) = mean(data.^2);
 for i = 2 : length(data)
     sigma2(i) = (0.06*data(i-1).^2) + (0.94*sigma2(i-1));
 end 
  f = -0.5*log(2*pi*sigma2)-(data.^2)/(2*sigma2);
  MLE = sum(f);
end

And MATLAB WINDOW shows me that message: Error using - Matrix dimensions must agree.

Error in RiskMetrics (line 7) f = -0.5*log(2*pi*sigma2)-(data.^2)/(2*sigma2);

I've also tried the 'minus' but nothing...

Answer 1

[Matt J]

Looks like you need ./ here

(data.^2)./(2*sigma2)

[mary pean]

yap!!!! thank you so much!!!!!!!!