Is there anyway to plot a line in 3D graph tool? It seems like intrpolation doesn't work in 3D if all the points lie in a line. A patchy solution is to plot in a scatter point, but it indeed looks ugly. I would really appriciate if someone has any clever solution. I am attaching a Matchad 15 file for the refrence.
It still is a Scatter Plot (not a Surface Plot), but shows a line when you set the appearance correctly:
If you intend to use a surface plot, you have to add a (dummy) argument to your function f.
Then you simply can use the quickplot feature (left picture) or (preferable) the CreateMesh function.