Hi! I have data on citizens movements from Census: I have a dataset in which each row shows these data: "origin census section" "destination census section" "range of departure time" "range of duration of travel" "means of transport (by car/by bycicle/public bus etc..)" I would like to retrieve data from this dataset only in one specific hour range: from 7.30am to 8.30am. The problem is that I don't know the specific time of departure and the specific duration of travel. Infact the ranges avaible for departures are: before_6.15am, 6.15am-6.45am, 6.45am-7.14am, 7.15am-7.44am, 7.45am-8.14am, 8.15am-8.44am, 8.45am-9.14am, after-9.15am. And the duration in minutes are in ranges: to-15, from-16-to-30, from-30-to-60, more-60. I make a example: The first row of my dataset say to me that there was a travel from census section 025 to section 122 and that it started in the range 6.45am-7.14am and that the duration is in the range from-16-to-30(minutes). How can I say that this travel touched my specific hour range (7.30-8.30). Infact if this travel started at 7.00am (possible) and it finished at 7.20 (duration=20min, 16'<20'<30'), it didn't touch the 7.30-8.30 period. But, if this travel started at 7.10am and it finished at 7.35am (duration=25min), it touched the 7.30-8.30 period. Can anyone suggest me a way to determine what data to choose so that I am able to work with movements between 7.30am and 8.30am? Thank you very much! . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
