9 Replies Latest reply: Nov 14, 2011 10:53 AM by marco antonio jimenez RSS

    Set Analysis on Week Start Date

    Daron Bergstrom

      In the chart below I am using Set Analysis to compare the trips/week year over year. How can I get the chart to show actual dates of the first of the week, instead of the week numbers (seeing as how most people can't look at a week number and know the week start date). It seems the Set Analysis will only work if I use week numbers. :(

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        • AW:Set Analysis on Week Start Date
          jigoro

          You calculate the week in the script? Then add a field with the first date of week (function weekstart).

          Use your Set Analysis and change the dimension to the data.

           

           

            • AW:Set Analysis on Week Start Date
              Daron Bergstrom

              Thanks for the response.

              I do calculate the week start in the script, but the a week start date will be Dec. 6 in 2009, and Dec 7. in 2008, which means that since the week start dates are different, the set analysis will read them differently and will not be able to stack them. Does that make sense? If I use the week number then the set analysis will read it as 49 in 2008 and compare it to the same week 49 in 2009. Any other suggestions?

                • AW:Set Analysis on Week Start Date
                  Neil Miller

                  Which start date would you be displaying? If they are different for each year, then you have to choose which one to display.

                  Some of the data I work with is similar. We want to compare year to year by week, but the actual dates are different. We have a calendar table that has a field which stores the corresponding date in the previous year. I think by utilizing a calendar table, you could come up with a way to match the years up.

                  One idea would be to load up the week numbers and the 2009 (current year) start dates as a separate table. Then link up the week numbers from the main data set to this week numbers in the new table. Then for each record, you have a week number and corresponding current year week start date.

                    • AW:Set Analysis on Week Start Date
                      Daron Bergstrom

                      I would be displaying the current year's week start date and always comparing it to last years.

                      I came up with this formula, but I can't get it to work. Can you tell where I'm going wrong? I am trying to use dollar sign expansion to take the pickupweek & year (39-2009), trim it to 39-20, then take the far right 2 numbers and subtract one, leaving me with 39-2008 which is the set I'm looking for.

                       



                      count({$<PickupWeekYear = {$(#=left(Only(PickupWeekYear),len(PickupWeekYear)-2) & (right(Only(PickupWeekYear),2)-1))}>} TripNo)




                • Set Analysis on Week Start Date

                  I have a question I have a field number of weeks, and I want to select and show me 8 weeks numbers backwards

                  is it possible?