Surface plot from excel data

I have a file in excel with varying data in x, y & z independent of each other. How do I surface plot these ??

I did import the X and Y data from excel to matlab, also one of the Z data but not the entire Z data, but shows errror on trisurf(tri,x,y,z); any suggestions?

function plot3Ddata(x,y,z)

test = xlsread('test1.xlsx', 'O2:Q3722');

x=test(:,1);

y=test(:,2);

z=test(:,3);

tri = delaunay(x,y);

trisurf(tri,x,y,z);

end

Answer 1

[David Hill]

a=readmatrix('test1.xlsx');
x=a(1,2:end);
y=a(2:end,1);
z=a(2:end,2:end);
[X,Y]=meshgrid(x,y);
surf(X,Y,z)

[Patrick Chen]

Thanks a lot with the help