RMSE of 1 row of a matrix?

Question

fadams18 2021-7-3

回答： dpb 2021-7-3

Hello Matlabers,

I have this code i used to find the RMSE

sensor=3 ;
RMSE = zeros(sensor,30);  
RMSE(:,i) = vecnorm(F(:,1:sensor)- F_theo(:,1:sensor),2,2)/sqrt(sensor);

However this returns a 3 x 30 matrix at the end of 30 iterations. Is there a way to just obtain the RMSE of the first row and last value? i.e.

RMSE(1,end)

but i want to calculate it directely. without having to obtain my 3x30 matrix and then extracting it.

Answer 1

dpb 2021-7-3

Guessing without a clear definition of what things are and what, exactly it is that is wanted...

RMSE=norm(F(1,1:sensor)- F_theo(1,1:sensor),2,2)/sqrt(sensor);

but, as noted, that's purely guesswork.

We need a much more complete description of what you have and what, specifically, you're trying to calculate here.