function plotNodes(file)

A = load(file);

x = A(:,1);
y = A(:,2);
z = A(:,3);

xlin = linspace(min(x), max(x), 129);
ylin = linspace(min(y), max(y), 129);

[X Y] = meshgrid(xlin, ylin);

Z = griddata(x,y,z,X,Y,'cubic');

surf(X,Y,Z); shading interp; view([0 0 1])
