[Gretl-users] AR(I)MA on hourly data

Hi, i'd like to fit an ARMA or ARIMA model to hourly timeseries data. As i see monthly or quarterly timeseries in examples most of the time, some questions arise: My data summary: Type of data: time series Frequency: hourly Range: 1:01 - 3325:24 (n = 79800) <- yes, a lot i assume? - is there any possibility to use special labels for my values? I imported the timeseries from CSV files which had a timestamp for each value. gretl extracted these strings and stored them in string_table.txt. How can i use these strings for example in plots? Having only 3456:23 as label isn't much of a help, "2006-04-02 15:00:00" would be much better. What is the string_table.txt for? Haven't found any clue in the docs. - I know about X-12-ARIMA and TRAMO/SEATS integration and i also know about their limitation of about 720/600 values. Is it true that both programs only work for monthly timeseries? I have the feeling that any results on my hourly data would be worthless (apart from the fact that i have to trim the data dramatically) - why can't i compact my data with gretl? hourly -> daily -> weekly -> monthly... even daily data cannot be compacted AFAIR. - a general question: can i resize the plots that gretl produces (aspect-ratio changes for example)? or do i have to: 1. save the plot as icon 2. copy over the plot commands to gnuplot 3. edit size of plot manually by issuing "set term ..." (i want to store the plot as file) Any answer or starting tips are much appreciated. Thanks in advance! -- mfg, Oliver