How to overcome this problem; Error using - Matrix dimensions must agree.

Hello guys! please i need your input. i wanted to calculate an error using this equation

En =sqrt(((psi-p)^2)/psi^2); with psi having 108x108 double and p having 101x136 double dimensions. the error using - matrix dimesions must agree keep pupping.

i knew the two are of different dimensions, but i think if i use interpolation it will increase the error too. please is there any alternative method to make such calculation?

Answer 1

[KSSV]

Two options:

Reduce dimensions

psi = psi(1:101,1:108) ; 
p = p(1:101,1:108) ; 
En =sqrt(((psi-p)^2)/psi^2);

Do interpolation

[Abba Alhaji Bala]

thanks KSSV

[Abba Alhaji Bala]

The first one worked but yet recieved another issue after running "Warning: Rank deficient, rank = 3, tol = 6.803137e-17. " and instead of a single value of En it came as a 101x101 complex

[KSSV]

En =sqrt(((psi-p).^2)./psi.^2);