RMSE heart rate estimation

How do i write RMSE fomula in matlab. K is the length signal

Answer 1

[Chunru]

hrerror = randn(100, 1);    % generate some random data
hr_rmse =rms(hrerror)       % use rms function

hr_rmse = 1.0289

hr_rmse1 = sqrt(mean(hrerror.^2))      % root-mean-square

hr_rmse1 = 1.0289

% Not recommended
hr_rmse2=0;
K = length(hrerror);
for i=1:K
   hr_rmse2 = hr_rmse2 +  hrerror(i).^2;
end
hr_rmse2 = sqrt(hr_rmse2/K)

hr_rmse2 = 1.0289

[Amir Hamzah]

can you manually code like fomula above? btw thank you

[Chunru]

see above

[Amir Hamzah]

Thankkkk youuuu, solved!!!!!