3D surface plot

This is my code so far, how i can i create a 3D surface plot just like the figure below:

X=[1.000, 1.250, 1.500, 1.250, 1.500, 1.750]';
Y=[1.000, 1.000, 1.000, 1.500, 1.500, 1.500]';
Z=[42.2, 42.6, 43.2, 42.1, 42.4, 43.1]';

figure
plot3(X,Y,Z,'mo')
grid on
xlabel('cold water flowrate')
ylabel('hot water flowrate')
zlabel('temperature')

[Dyuman Joshi]

To create a surface place, your Z entry needs to be a matrix (atleast 2x2)

Answer 1

[Dave B]

You can interpolate using a scatteredInterpolant to make a matrix over the range of X and Y and then use surf to draw it, but I think you probably need more points to get a nice looking picture.

X=[1.000, 1.250, 1.500, 1.250, 1.500, 1.750]';
Y=[1.000, 1.000, 1.000, 1.500, 1.500, 1.500]';
Z=[42.2, 42.6, 43.2, 42.1, 42.4, 43.1]';

[xi,yi]=meshgrid(X,Y);
f=scatteredInterpolant(X,Y,Z);
zi=f(xi,yi);

surf(xi,yi,zi)