No exact solutions without your code and data.
One approach:
xv = -15:0.8:15;
yv = -10:0.8:10;
[X,Y] = ndgrid(xv, yv);
z = @(x,y) sin(x) + cos(y);
figure
mesh(X, Y, z(X,Y))
hold on
line_at_x = 5; % Define ‘x’ Value Of Line
plot3(line_at_x+zeros(size(yv)), yv, z(line_at_x+zeros(size(yv)), yv), '-r','LineWidth',2) % Add Line To ‘mesh’ Plot
hold off
grid on
xlabel('X')
ylabel('Y')
view(10, 10)
EDIT — (2 Apr 2020 at 14:16)
Improved code.
