[Gretl-users] frequency distribution

Hello, I would like to ask for a little help. I have two time series (hourly observations) - data available here: http://is.muni.cz/de/99107/prices.gretl And I would like to get the basic information about the frequency of each observation value ( => frequencies with an incremental value (bin width) of 1 unit). When I go through the GUI, I can see that, for example, for the time series CZ, there is n=8760, so there is 8760 different values of observations. But for some reason, I am not able to make 8760 bins to see the required information. When I choose "minimum value, left bin: 0, gretl automatically corrects it to -2.748 (even though the highest observed value in the data is 1). If I make it -3.0 and want to make a bin width of 1, gretl automatically corrects it to 1.198.... I can make bins of width 2, but that is too much of an aggregation. How can I make bins width 1 to see the frequency of each observation value in the data? Thank you! Tomas