Error using surf (line 71) Data dimensions must agree

Hello,

I have the kind of problem with my code and I don't understand why:

for it=1:2
    xt(it,1)=it
    for jt=1:3
        yt(1,jt)=jt
        zt(it,jt)=it+(jt-1)
    end
end
figure;
surf(xt,yt,zt,'EdgeColor', 'None', 'facecolor', 'interp');
view(2);
colormap(jet(256));
c = colorbar;

Could you help me to find my error please?

Thanks in advance!

[Walter Roberson]

Also answered (with clarifications about the problem) at https://www.mathworks.com/matlabcentral/answers/532468-surf-plot-data-dimensions-must-agree#comment_2978992

Answer 1

[Alan Stevens]

More like this?

for it=1:2
    for jt=1:3
    zt(it,jt)=it+(jt-1);
    end
end
[x,y] = meshgrid(1:3,1:2);
figure;
surf(x,y,zt,'EdgeColor', 'None', 'facecolor', 'interp');
view(2);
colormap(jet(256));
c = colorbar;   

[Hélène Parisot-Dupuis]

I didn’t think xt and yt should be matrices too.

It works now, thank you!

[Voss]

@Hélène Parisot-Dupuis: xt and yt don't have to be matrices. If they are vectors, then zt must be of size numel(yt)-by-numel(xt). Your zt is of size numel(xt)-by-numel(yt), so if you transpose zt in the surf call, it runs without error.

for it=1:2
    xt(it,1)=it;
    for jt=1:3
        yt(1,jt)=jt;
        zt(it,jt)=it+(jt-1);
    end
end
xt

xt = 2×1

1 2

yt

yt = 1×3

1 2 3

zt

zt = 2×3

1 2 3 2 3 4

figure;
surf(xt,yt,zt.','EdgeColor', 'None', 'facecolor', 'interp');
view(2);
colormap(jet(256));
c = colorbar;

[Hélène Parisot-Dupuis]

Thank you very much for this clarification!

[Voss]

You're welcome!