15 Replies Latest reply: Sep 6, 2011 6:22 AM by mona_qlik RSS

Question about mapping

mona_qlik

Hi,

 

Please i have a question about mapping

 

i have field called Activity

which has the values of 1,2,3,4

 

i want to represent them with names A,B,C,D

so i made mapping

 

LOAD * Inline

[

Activity , Name

1,A

2,B

3,C

4,D

];

 

when i select Name it reflects to the Activity

but when i used the Activity in the expression it doesn't reflect anything

hope the attached example clarify the problem

  • Re: Question about mapping
    Jason Michaelides

    Hi Mona,

     

    I've fixed this up for you and offered an alternative using ApplyMap() - just comment out the top part of the script and uncomment the second part.

     

    Hope this helps,

     

    Jason

    • Question about mapping
      mona_qlik

      thanks Jason for your help

      but in my case as i attached iun the document i have to create another field resident the first one but this not working in the expression

      i.e the field that's not reflected is the ActivityNew not the Activity

      Hope the problem now is clear

      • Question about mapping
        Jason Michaelides

        Sorry Mona but I don't really understand what you're trying to achieve.  Are you saying you want 2 fields with exactly the same values in them, one called Activity and one called ActivityNew?

      • Question about mapping
        swuehl

        I also don't really get what you want Mona.

         

        If you need to keep your data model (maybe because we dont't understand your whole picture), you could use

         

        =Sum({$<Activity={'$(=only(ActivityNew))'}>}Value)

         

        in your table to get your / some / any results (because I ... see above).

         

        Regards,

        Stefan

        • Question about mapping
          mona_qlik

          Sorry Stefan and Jason

          i know that my problem is complicated so above i attached a simplified example but not the real case so you can't understand what i want to do

           

          Actually the last expression Stefan has posted is working in the case that (A) For example is reflected to (1)

          which is

          =Sum({$<Activity={'$(=only(ActivityNew))'}>}Value)

           

          but what if the mapping for Name (A) is related with 2 activities (1 and 2 for example)

          and i want the above expression to work with them??

          • Re: Question about mapping
            Jason Michaelides

            If I understand you correctly (and I'm afraid I'm still not sure I do!) then both my solutions would still work in this case.  Just add the second mapping to the Map table:

             

             

            Activity_Map:
            LOAD * Inline
            [
            Activity,Name
            1,A
            2,B
            3,C
            4,D
            5,A
            6,A
            7,A
            ];
            
            

             

            Jason

            • Question about mapping
              mona_qlik

              yes Jason i did it

              but now i want an equal expression to the one Stefan posted

              =Sum({$<Activity={'$(=only(ActivityNew))'}>}Value)

              to be used in the case of 2 Activities has the same name

              is that clear?

              • Question about mapping
                Jason Michaelides

                Sorry Mona - if you'd like to expand on what you are trying to achieve and why you're taking the approach you are then maybe we can help more.  I'm afraid I really don't understand what you're trying to do.  Does Stefan's expression above do it for you?

                 

                Jason

          • Question about mapping
            swuehl

            Also I am just guessing:

            =Sum({$<Activity={'$(=concat(ActivityNew,chr(39)&','&chr(39)))'}>}Value)

             

            allows to assign multiple ActivityNew values to be assigned to Activity.

            • Question about mapping
              mona_qlik

              Thanks Alot Stefan

              it's working

              but if u please explain what's meant by ch(39) as i can't undersatnd your expression

              but it's working correctly,just i need to understand

              • Question about mapping
                swuehl

                Mona,

                 

                the expression

                '$(=concat(ActivityNew,chr(39)&','&chr(39)))'

                will create a list of the comma separated ActivityNew values, each in quotes (chr(39) is calling the function to return ' with given ASCII code 39 for ' ). The list will then be taken as element_set by the set analysis expression, assigning the values to the field Activity.

                 

                I noted also that adding a DISTINCT before ActivitiyNew might be a bit more elegant.

                 

                Hope this solves your issue.

                 

                Regards,

                Stefan

                 

                P.S: In cases like that, it might be good to spend a few words on your "big picture", this may allow to disregard some solutions upfront and may save some time

  • Re: Question about mapping
    swuehl

    Mona_qlik,

     

    if you want to keep the tables not linked, you could just remove the second load from the script and change your expression in the table to

    =sum(if(Activity=NewActivity,Value))

     

     

    Table1:

    LOAD * Inline

    [

    Activity,Value

    1,200

    1,400

    1,300

    2,50

    2,300

    3,340

    3,690

    4,300

    4,90

    ];

     

    //LOAD Activity as ActivityNew

    //Resident Table1;

     

    LOAD * Inline

    [

    ActivityNew,Name

    1,A

    2,B

    3,C

    4,D

    ];

     

    Regards,

    Stefan

     

    P.S. Or use a mapping load with your second table and applymap in your first (you need to change the order of your tables though)

     

    P.P.S: I would prefer Jasons second solution (essentially what I meant with my first P.S., just saw his after comitting my post)

     

    edited by swuehl