Plot3 and vector match issue

hello all,

I want to plot three functions (f1, f2, Fall) in different vector sizes (x,y) using plot3. Is there a way to do that?

if in case the only way is to have these vectors matched, how can match their sizes in matlab?

here is the code:

 x = 1e3:10e6;    \\ Freq of operation (big vector)
 y = 3e-3:500e-3;   \\resistance in the circuit

 a=1e-6; \\ value that I change every time to get the optimized one

 f1   = 5.*x ;
 f2   = sqrt ((1/(a^2).*(x.^2)) + (5.*(Ron.^2));
 Fall = f1 + f2;

 figure (1); plot3(x,y,f1)
 figure (2); plot3(x,y,f2);
 figure (3); plot3(x,y,Fall);

thanks

Answer 1

[KSSV]

N = 10000 ;   % can be changed
% x = 1e3:10e6;    % Freq of operation (big vector)
x = linspace(1e3,10e6,N) ;
% y = 3e-3:500e-3;   %resistance in the circuit
y = linspace(3e-3,500e-3,N) ;
a=1e-6; % value that I change every time to get the optimized one
f1   = 5.*x ;
f2   = sqrt ((1/(a^2).*(x.^2)) + (5.*(Ron.^2)));
Fall = f1 + f2;
figure (1); plot3(x,y,f1)
figure (2); plot3(x,y,f2);
figure (3); plot3(x,y,Fall);

Answer 2

[AbuYusuf]

Thank you so much! it works perfect. However, I was expecting to see 3D plot like a surface. I think plot3 does only line plot in 3D, right? I checked the surf function and tried to use it here but failed!

would you help me with this?