function three_D_Surf
clear all;clc
data=xlsread('Data.xlsx');
t=data(1,2:end);
x=data(2:end,1);
y=data(2:end,2:end);
size(t)
size(x)
size(y)
[ti,xi]=meshgrid(min(t):(max(t)-min(t))/10/length(t):max(t),min(x):(max(x)-min(x))/10/length(x):max(x));
yi=interp2(t,x,y,ti,xi,'spline');
figure(1)
surf(xi,yi,ti),shading interp;
xlabel('x'),ylabel('y'),zlabel('t'),colorbar;