Option 1: USe scatter:
[num,txt,raw] = xlsread('Data_3Dplot.xlsx') ;
num = num(9:end,:) ;
nodes = num(:,1) ;
value = num(:,2) ;
x = num(:,3) ;
y = num(:,4) ;
z = num(:,5) ;
scatter3(x,y,z,10,value,'filled')
Option 2: Make unstructured grid
[num,txt,raw] = xlsread('Data_3Dplot.xlsx') ;
num = num(10:end,:) ;
nodes = num(:,1) ;
value = num(:,2) ;
x = num(:,3) ;
y = num(:,4) ;
z = num(:,5) ;
dt = delaunayTriangulation(x,z) ;
t = dt.ConnectivityList ;
p = dt.Points ;
p(:,3) = value ;
trisurf(t,p(:,1),p(:,2),p(:,3));
view(2)
shading interp ; colorbar
Option 3: Make a structured grid
[num,txt,raw] = xlsread('Data_3Dplot.xlsx') ;
num = num(10:end,:) ;
nodes = num(:,1) ;
value = num(:,2) ;
x = num(:,3) ;
y = num(:,4) ;
z = num(:,5) ;
N = 500 ;
xi = linspace(min(x),max(x),N) ;
zi = linspace(min(z),max(z),N) ;
[X,Z] = meshgrid(xi,zi) ;
C = griddata(x,z,value,X,Z) ;
surf(X,Z,C)
shading interp ; colorbar
view(2)
