I have the following problem. My graph is defined at 4 points (100, 1000, 2000, 4000). Therefore I would like to have only these 4 labels on the X-Axis. But sadly I have no clue to do that.
Additionally I have again problems with circular markers (Thats why I use asteriks). They are visible when I compile the file but are not drawn in the .tex file. This is extraordinary bizarre, since when my graph had 5 points, they where visible (This was the last question I had here).