9 Replies Latest reply: Oct 2, 2016 3:31 PM by Fikri Shihab RSS

    Counting status change in certain cells

    Fikri Shihab

      Hi Qlik experts,


      I have log files that contain fields as follows: Time Stamp, device name, cell_id, region and status, on_line.


      Cell identifies a sub are where the device is located.


      I have a requirement to count status change for each device from one cell to another cell with the following criteria:


      for each device name if cell id is different from the previous one and status is "IN" and on_line >0, then include this in the count. Otherwise don't count.


      I am sure this is very simple but could someone suggest the right expression or script for this.



        • Re: Counting status change in certain cells
          Massimo Grossi

          Do a resident load of your table order by device, timestamp (or maybe an id you can add to order the table records as you want).

          Use the peek function to check if the device of the current row is the same as the previous row and if the sub changed; also check the status N and on_lie > 0. If all the check are ok, you can set a new column (flag) to 1.


          In a chart, sum the flag

          • Re: Counting status change in certain cells
            Vishwarath Nagaraju

            Adding to Maxgro's solution from above:

            Use sum(Flag) in your chart expression with relevant dimension.


            LOAD *,

                     IF(cell_id <> Peek('cell_id) AND status = 'IN' AND on_line >0, 1,0) As Flag;

            LOAD Time Stamp,

                      device name,





            FROM <YourLogfilenameLocation path>;

            If this doesn't work please share your script or a sample file to work on it?

              • Re: Counting status change in certain cells
                Fikri Shihab



                It does not seem to be working. BTW, what is the difference between previous and peek in this case? can we use previous instead?



                Please find attached the sample file. The header names are a little bit different which is called area number, but they are conceptually the same. I'd like to know the rate of area number change for each customer_id wit certain condition.  In this sample the status is IN_NETWORK.





                  • Re: Counting status change in certain cells
                    Massimo Grossi

                    I'm not sure to understand all your conditions.

                    I set the flag when the customer is the same and the area number changes and status IN_NETWORK




                      • Re: Counting status change in certain cells
                        Fikri Shihab

                        Hi Maxgro,


                        Thanks for the showing the result with the example and the QVW file. I wonder if you could post the script here since I am still working on getting the professional license so I can't open the file.


                        What  have done in the script is after loading the full table I added resident load as below:




                          [area number], [customer id],


                             If([area number] <> peek([area number]) and status = '*IN_NETWORK*' AND online >0,1,0) as Switch

                             Resident device-status

                             ORDER BY [device id],Date,Time;


                        But it does not give me correct result. It is either all 0 or 1. Anything missing in my script?