From: Adrian HILL <adrian.hill@es...>  20110504 12:45:37

I hope someone on this list can help me here. I am a complete matplotlib and python novice, so please forgive me if it is a rather simple question. I am trying to plot markers in matplotlib. I have values at x at which they should appear, but that is it. The y value of them should just be an arbitrary value (for example 0). Here is an example of the data 2.10686 4.21443 5.01784 6.20608 6.32343 6.44145 6.77794 ... .. . I can load the data with reflections_1=numpy.loadtxt("list.txt") phase_1=reflections_1[:,0] What is the best way of now plotting this (as single vertical marker lines)? I thought of using the quiver function, but cannot get this to work. Any help appreciated. Thanks Adrian 