3D Ploting with a column having the same value

hi, i'm currently having a little trouble or misunderstanding. I want to plot a Matrix using countourf.

Matrix =

L       C       P
1  1  953.2606
1  2  752.0167
1  3  1
1  4  1.2286e+03
1  5  1
1  6  2.1819e+03
1  7  720.2413
1  8  1.0804e+03
1  9  1.6523e+03

but as you can see the first column is the same value, i tried:

xi=linspace(min(L1),max(L1),30);
yi=linspace(min(C),max(C),30);
[XI YI]=meshgrid(xi,yi);
ZI = griddata(L1,C,P,XI,YI);
figure
contourf(XI,YI,ZI);

L1 beeing the L broken down into 9 to fit:

0,111111111111111
0,222222222222222
0,333333333333333
0,444444444444444
0,555555555555556
0,666666666666667
0,777777777777778
0,888888888888889
1,00000000000000

but still nothing shows. and the same could be true for something like that:

    L   C       P
    1  1  953.2606
    2  1  1.6523e+03
    3  1  1.0804e+03
    4  1  953.2606
    5  1  1.6523e+03

The thing is i would like a something other than a line when i plot in 3d, i would like a cartography, thus why i use contourf.

Thank you

Answer 1

[KSSV]

data = [1  1  953.2606
1  2  752.0167
1  3  1
1  4  1.2286e+03
1  5  1
1  6  2.1819e+03
1  7  720.2413
1  8  1.0804e+03
1  9  1.6523e+03];

L = data(:,1) ; 
C = data(:,2) ; 
P = data(:,3) ;

X = reshape(L,[3 3]) ;
Y = reshape(C,[3 3]) ;
Z = reshape(P,[3 3]) ;
figure
contour(X,Y,Z) ;  
title('It gives a line')
figure
contourf(Z)
title('If you dont consider X and Y')

[Samuel Cloutier Landry]

Thank you, and let's say i have something like that

1  1  953.2606