I want someone who can help me to see a grid and airfoil in the same plot , here is my code

clear all;

 close all;
 clc;
 Mi=0.5;
 T=300;
 P=1;
 gamma = 1.4;
 R=287;
 vinf = sqrt(gamma*R*T)*Mi;
 Nx = 100; % x dimension
Ny = 30; % y dimension
Nxy= Nx*Ny;
% step sizes
dx = 1;
dy = 1;

x = 1:dx:Nx; % x axis
y = 1:dy:Ny; % y axis


%set grid location
for i=
    x(i)=single(i-1)*dx;
end


[xx,yy]=meshgrid(x,y); %develop grid based on 2 (x and y) arrays of different size
z=zeros(size(xx)); %generate z as a matrix of zeros (same size as meshgrid)
surf(xx,yy,z); %plots the 3 dimensions as a '2d plot' of meshgrid at z=0
view(1) %changes the 3d default view to a 2d for xy plane


hold on ;


% PLOT ARC

circx= linspace(0,1,40);
circy= sqrt(8.35^2 - (circx-.5).^2)-8.335;

plot(circx, circy) % Draw An Arc
axis([-0.5   1.25   -.1   .1])  % Set Axis Limits

hold off

Answer 1

[KSSV]

clear all;

 close all;
 clc;
 Mi=0.5;
 T=300;
 P=1;
 gamma = 1.4;
 R=287;
 vinf = sqrt(gamma*R*T)*Mi;
 Nx = 100; % x dimension
Ny = 30; % y dimension
Nxy= Nx*Ny;
% step sizes
dx = 1;
dy = 1;

x = linspace(0,1,Nx); % x axis
y = linspace(0,1,Ny); % y axis


%set grid location


[xx,yy]=meshgrid(x,y); %develop grid based on 2 (x and y) arrays of different size
z=zeros(size(xx)); %generate z as a matrix of zeros (same size as meshgrid)
pcolor(xx,yy,z); %plots the 3 dimensions as a '2d plot' of meshgrid at z=0
% view(1) %changes the 3d default view to a 2d for xy plane


hold on ;


% PLOT ARC

circx= linspace(0,1,40);
circy= sqrt(8.35^2 - (circx-.5).^2)-8.335;

plot(circx, circy) % Draw An Arc
axis([-0.5   1.25   -.1   .1])  % Set Axis Limits

hold off