Hi, gretl successfully imported excel files with data for me, where to my amazement the first column which contained the definitions of the categories was automatically imported as "observation markers" (in gretl-speak). We're talking about histogram data here, i.e. the categories are ranges and the data values are the (absolute) number of occurrences. My question: Is it possible to make these observation markers appear as tick labels on the x-axis, when I do a plot of my variable against the index variable to get the visual shape of the histogram? Hope I made myself clear here. thanks, sven