CIGAL Reference Manual, Chapter 2 (Commands): PLOT
usage: plot yvarb xvarb [key intens errs storflg symsiz xoff xscal yoff yscal]
0 - single points 8 - open circles 1 - straight line curve 9 - filled circles 2 - (undefined) 10 - open boxes 3 - horizontal ticks (-) 11 - filled boxes 4 - vertical ticks (|) 12 - open triangles 5 - X's 13 - filled triangles 6 - +'s 14 - open diamonds 7 - *'s 15 - filled diamonds 16 - draw error bars on XVARB, otherwise on YVARB 32 - draw a smooth (splined) curve 64 - don't connect points with value 0
Note: KEY values 16 or greater can be added to any other value. Different KEY values less than 15 can be combined in a single call. Therefore, getting a line with symbols means making two calls to PLOT (although you can get a splined (smooth) line with symbols in a single call).