How to plot a 3d plot (surf) from an XYZ table, X and Y coming from for loops?

I know this question is similar to almost all the questions on 3d plot, but I want to understand how I can improve my script ahead when writing the for loops. And later easily plot the surf plot.

I have this code (not I MWE, I give the output directly after:

 for tau=1:2
     for phi=0:25
         fraconnect=sum(sum(phi))/25
         %here I'm calling a function (not here) that integrates phi and tau
         [t, m]=ode45(@Diff_con,[0 T],phi, tau)
         nb=sum(sum(m));
         prev=[prev; nb, tau, fraconnect];     %so here I'm not interested in getting phi out 
     end
end

and I get a real table that I'd like to turn into a surf plot:

prev= 

       1.0649            1         0.04
       1.0018            1         0.08
       1.0649            1         0.12
       1.1463            1         0.16
            1            1          0.2
       1.1285            1         0.24
       1.0827            1         0.28
            1            1         0.32
        1.258            1         0.36
       1.3202            1          0.4
       1.2086            1         0.44
       1.5489            1         0.48
        1.479            1         0.52
       1.8405            1         0.56
       1.9672            1          0.6
        1.294            1         0.64
          3.3            1         0.68
       7.4016            1         0.72
       5.9797            1         0.76
       11.438            1          0.8
         22.9            1         0.84
       75.764            1         0.88
       95.413            1         0.92
       187.06            1         0.96
        325.6            1            1
            1            2         0.04
            1            2         0.08
       1.5709            2         0.12
       1.2779            2         0.16
        1.257            2          0.2
            1            2         0.24
       1.9758            2         0.28
       10.729            2         0.32
       6.5317            2         0.36
       166.99            2          0.4
       222.71            2         0.44
       13.212            2         0.48
       609.52            2         0.52
       819.03            2         0.56
       1174.8            2          0.6
       1234.7            2         0.64
       1403.5            2         0.68
       1494.2            2         0.72
         1459            2         0.76
       1649.3            2          0.8
       1784.2            2         0.84
       1865.8            2         0.88
       1979.3            2         0.92
       2074.3            2         0.96
       2166.2            2            1

Answer 1

[Mischa Kim]

hibou, use

 X = reshape(prev(:,1),[],2);
 Y = reshape(prev(:,2),[],2);
 Z = reshape(prev(:,3),[],2);
 surf(X,Y,Z)

[hibou]

Thanks! That's exactly what I wanted ! the solution with griddata was also pretty cool but basically I wanted to understand what surf needed ! Great !