'Matrix dimensions must agree' error

i have this code and it says that the matrix dimensions must agree. What am i doing wrong? I'm really new in matlab.

Re = 190000:10000:290000;

Pr = 3.66:0.5:5.66;

Pr = double(Pr);

Nu = [(0.3+0.62.*Re.^(1/2).*Pr.^(1/3))/(1+(0.4/Pr).^(2/3)).^(1/4)].*(1+(Re/282000))

[IOANNIS KORACHAIS]

The 'Pr = double(Pr)' is a mistake i made, i forgot to erase it for this post sorry

Answer 1

[Star Strider]

Vectorise all multiplication, division and exponentiation operations, and it works:

Re = 190000:10000:290000;
Pr = 3.66:0.5:5.66;

[Rem,Prm] = ndgrid(Re, Pr);
    
Nu = @(Re,Pr) ((0.3+0.62.*Re.^(1/2).*Pr.^(1/3))./(1+(0.4./Pr).^(2/3)).^(1/4)).*(1+(Re/282000))

figure
surf(Rem, Prm, Nu(Rem,Prm))
grid on

.