3D smooth plot in Matlab from excel imported data

Hi, I imported data from Excel worksheet using xlsread function. I did a 3D plot using the data. I used trisurf, but I want a smooth curve. How can I convert my plot into a smooth plot? I attached the screenshot of my excel data and 3D plot. Here is the code I wrote for the plot:

dataset = xlsread('scan2_Laser.xlsx','Sheet1', 'B2:E1738');
x = dataset(:,1);
y = dataset(:,3);
z = dataset(:,4);

tri = delaunay (x,y);
trisurf(tri,x,y,z);
title ('3D Plot scan 3 20mA Laser Power');
xlabel ('x position');
ylabel ('y position');
zlabel ('APD Current');

Any kind of help will be appreciated. Thanks in advance.

Answer 1

[KSSV]

YOu need to increase the data points in order to smooth it....you need to have a look into griddata, scatteredinterpolant.

[Nabila Tabassum]

Hi KSSV, FYI my z is not a function of x and y. x, y and z are collected data's from one test. so I want to plot z vs x and Y. in that case griddata, scatteredinterpolant will work?

[Walter Roberson]

scatteredInterpolant is appropriate for this situation.