Forecasting Multiple (few hundreds) uni-variate time series with inflated zeros












2












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Hello Practitioners,



Being a newbie seeking help to gain experience in Data Science.



Lets take a scenario where a big company wants to forecast its sales(a specific product) across different stores in different geographic locations.
As an Analyst, a task is given to forecast few hundreds of series(sales) for next 3 months. since, we are forecasting sales across different geographic
locations, the nature of the series would not be same for all. There would hundreds of models to check with.
what are the suggested approaches for this scenario with your experience in this field? Also, how important it is know the nature of each series in this scenario?



Thanks in Advance.










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    2












    $begingroup$


    Hello Practitioners,



    Being a newbie seeking help to gain experience in Data Science.



    Lets take a scenario where a big company wants to forecast its sales(a specific product) across different stores in different geographic locations.
    As an Analyst, a task is given to forecast few hundreds of series(sales) for next 3 months. since, we are forecasting sales across different geographic
    locations, the nature of the series would not be same for all. There would hundreds of models to check with.
    what are the suggested approaches for this scenario with your experience in this field? Also, how important it is know the nature of each series in this scenario?



    Thanks in Advance.










    share|improve this question









    $endgroup$




    bumped to the homepage by Community 13 hours ago


    This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.


















      2












      2








      2


      1



      $begingroup$


      Hello Practitioners,



      Being a newbie seeking help to gain experience in Data Science.



      Lets take a scenario where a big company wants to forecast its sales(a specific product) across different stores in different geographic locations.
      As an Analyst, a task is given to forecast few hundreds of series(sales) for next 3 months. since, we are forecasting sales across different geographic
      locations, the nature of the series would not be same for all. There would hundreds of models to check with.
      what are the suggested approaches for this scenario with your experience in this field? Also, how important it is know the nature of each series in this scenario?



      Thanks in Advance.










      share|improve this question









      $endgroup$




      Hello Practitioners,



      Being a newbie seeking help to gain experience in Data Science.



      Lets take a scenario where a big company wants to forecast its sales(a specific product) across different stores in different geographic locations.
      As an Analyst, a task is given to forecast few hundreds of series(sales) for next 3 months. since, we are forecasting sales across different geographic
      locations, the nature of the series would not be same for all. There would hundreds of models to check with.
      what are the suggested approaches for this scenario with your experience in this field? Also, how important it is know the nature of each series in this scenario?



      Thanks in Advance.







      time-series forecasting






      share|improve this question













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      share|improve this question










      asked Mar 23 '18 at 8:57









      wlaurawlaura

      112




      112





      bumped to the homepage by Community 13 hours ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







      bumped to the homepage by Community 13 hours ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
























          2 Answers
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          active

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          0












          $begingroup$



          1. I can suggest auto.arima function from forecast library, if you are R user, if you are Python user then follow this link. All you need is to write simple for loop, which allows you to built best ARIMA models in different geographic locations:



               for (my_time_series in set_of_all_time_series){
            model=auto.arima(my_time_series )
            }


          2. You can cluster your time series by correlation (make sure that your time series are stationary to avoid spurious correlation). If this reduces the number of time series (which will depend on threshold on correlation), you can take any 1 member from each class, build any model (not only ARIMA) and apply model results on each member of that class.


          3. Contract VAR model







          share|improve this answer











          $endgroup$





















            0












            $begingroup$


            what are the suggested approaches for this scenario with your
            experience in this field?




            Another very popular approach (apart from @user112358 suggestion) is to use neural networks, particularly LSTM-RNN because of their inherent "memory" capabilities. Recurrent Neural Networks are a very good candidate when dealing with time series, such as forecasting of product sales, because they are the only variant of neural networks that can model the dynamics of a system.



            A very informative tutorial on how to rapidly prototype such an algorithm can be found here, targeting the Keras API using Python. I highly recommend that you check it, because it personally helped me a lot. It is also applied on a shampoo sales dataset, which is the exactly what you are looking for as a case study.






            share|improve this answer









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              2 Answers
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              2 Answers
              2






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              0












              $begingroup$



              1. I can suggest auto.arima function from forecast library, if you are R user, if you are Python user then follow this link. All you need is to write simple for loop, which allows you to built best ARIMA models in different geographic locations:



                   for (my_time_series in set_of_all_time_series){
                model=auto.arima(my_time_series )
                }


              2. You can cluster your time series by correlation (make sure that your time series are stationary to avoid spurious correlation). If this reduces the number of time series (which will depend on threshold on correlation), you can take any 1 member from each class, build any model (not only ARIMA) and apply model results on each member of that class.


              3. Contract VAR model







              share|improve this answer











              $endgroup$


















                0












                $begingroup$



                1. I can suggest auto.arima function from forecast library, if you are R user, if you are Python user then follow this link. All you need is to write simple for loop, which allows you to built best ARIMA models in different geographic locations:



                     for (my_time_series in set_of_all_time_series){
                  model=auto.arima(my_time_series )
                  }


                2. You can cluster your time series by correlation (make sure that your time series are stationary to avoid spurious correlation). If this reduces the number of time series (which will depend on threshold on correlation), you can take any 1 member from each class, build any model (not only ARIMA) and apply model results on each member of that class.


                3. Contract VAR model







                share|improve this answer











                $endgroup$
















                  0












                  0








                  0





                  $begingroup$



                  1. I can suggest auto.arima function from forecast library, if you are R user, if you are Python user then follow this link. All you need is to write simple for loop, which allows you to built best ARIMA models in different geographic locations:



                       for (my_time_series in set_of_all_time_series){
                    model=auto.arima(my_time_series )
                    }


                  2. You can cluster your time series by correlation (make sure that your time series are stationary to avoid spurious correlation). If this reduces the number of time series (which will depend on threshold on correlation), you can take any 1 member from each class, build any model (not only ARIMA) and apply model results on each member of that class.


                  3. Contract VAR model







                  share|improve this answer











                  $endgroup$





                  1. I can suggest auto.arima function from forecast library, if you are R user, if you are Python user then follow this link. All you need is to write simple for loop, which allows you to built best ARIMA models in different geographic locations:



                       for (my_time_series in set_of_all_time_series){
                    model=auto.arima(my_time_series )
                    }


                  2. You can cluster your time series by correlation (make sure that your time series are stationary to avoid spurious correlation). If this reduces the number of time series (which will depend on threshold on correlation), you can take any 1 member from each class, build any model (not only ARIMA) and apply model results on each member of that class.


                  3. Contract VAR model








                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Apr 9 '18 at 20:06

























                  answered Apr 9 '18 at 19:56









                  Dato GogolashviliDato Gogolashvili

                  213




                  213























                      0












                      $begingroup$


                      what are the suggested approaches for this scenario with your
                      experience in this field?




                      Another very popular approach (apart from @user112358 suggestion) is to use neural networks, particularly LSTM-RNN because of their inherent "memory" capabilities. Recurrent Neural Networks are a very good candidate when dealing with time series, such as forecasting of product sales, because they are the only variant of neural networks that can model the dynamics of a system.



                      A very informative tutorial on how to rapidly prototype such an algorithm can be found here, targeting the Keras API using Python. I highly recommend that you check it, because it personally helped me a lot. It is also applied on a shampoo sales dataset, which is the exactly what you are looking for as a case study.






                      share|improve this answer









                      $endgroup$


















                        0












                        $begingroup$


                        what are the suggested approaches for this scenario with your
                        experience in this field?




                        Another very popular approach (apart from @user112358 suggestion) is to use neural networks, particularly LSTM-RNN because of their inherent "memory" capabilities. Recurrent Neural Networks are a very good candidate when dealing with time series, such as forecasting of product sales, because they are the only variant of neural networks that can model the dynamics of a system.



                        A very informative tutorial on how to rapidly prototype such an algorithm can be found here, targeting the Keras API using Python. I highly recommend that you check it, because it personally helped me a lot. It is also applied on a shampoo sales dataset, which is the exactly what you are looking for as a case study.






                        share|improve this answer









                        $endgroup$
















                          0












                          0








                          0





                          $begingroup$


                          what are the suggested approaches for this scenario with your
                          experience in this field?




                          Another very popular approach (apart from @user112358 suggestion) is to use neural networks, particularly LSTM-RNN because of their inherent "memory" capabilities. Recurrent Neural Networks are a very good candidate when dealing with time series, such as forecasting of product sales, because they are the only variant of neural networks that can model the dynamics of a system.



                          A very informative tutorial on how to rapidly prototype such an algorithm can be found here, targeting the Keras API using Python. I highly recommend that you check it, because it personally helped me a lot. It is also applied on a shampoo sales dataset, which is the exactly what you are looking for as a case study.






                          share|improve this answer









                          $endgroup$




                          what are the suggested approaches for this scenario with your
                          experience in this field?




                          Another very popular approach (apart from @user112358 suggestion) is to use neural networks, particularly LSTM-RNN because of their inherent "memory" capabilities. Recurrent Neural Networks are a very good candidate when dealing with time series, such as forecasting of product sales, because they are the only variant of neural networks that can model the dynamics of a system.



                          A very informative tutorial on how to rapidly prototype such an algorithm can be found here, targeting the Keras API using Python. I highly recommend that you check it, because it personally helped me a lot. It is also applied on a shampoo sales dataset, which is the exactly what you are looking for as a case study.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered Jun 8 '18 at 22:31









                          pcko1pcko1

                          1,651418




                          1,651418






























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