getUid()).child("Requestor");
    reference.addSingleValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            //got all the list of the user ids 
            //userList is array of String which contains all userIds

            for (String userid : userList) {
                FirebaseDatabase.getInstance().getReference("Users").child(userid).addSingleValueEventListener(new ValueEventListener() {
                    @Override
                    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                        //got all the list of the user ids
                        //
                    }

                    @Override
                    public void onCancelled(@NonNull DatabaseError databaseError) {

                    }
                });
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });

 Q:

Create a correlation data.frame based on text.values from another data.frame in R?

Background:  I have a data.frame with text.values ranging from A to F, based on this data I want to compute the correlation data.frame in between the different companies by using this formula (example between company Aa & Cc):  
Count the number of times Aa & Cc move together, here 3 times and divide by the number of periods, here 4. Then create a data.frame with the different correlations. I have no clue of how to start this.. some insight would be much appreciated. 
I have the following values in data.frame "databasis"
       company    sector    lastmarketcap   X200202 X200203 X200204 X200205       
    1   Aa           B          18            A        D      E        B
    2   Bb           A          4571          F        C      D        B
    3   Cc           E          122           A        D      E        E 
    4   Dd           Z          239           B        C      E        C

Code for this table:
company <- c("Aa", "Bb", "Cc", "Dd") 
sector <- c("B", "A", "E", "Z") 
lastmarketcap <- c(18, 4571, 122, 239) 
getUid()).child("Requestor "); 
     reference.addSingleValueEventListener(new ValueEventListener () { 
         @Override 
         public void onDataChange(@NonNull DataSnapshot dataSnapshot) { 
             //got all the list of the user ids 
             //userList is array of String which contains all userIds 

             for (chain userid: userList) { 
                 FirebaseDatabase.getInstance().getReference("Users").child(userid).addSingleValueEventListener(new ValueEventListener () { 
                     @Override 
                     public nothingness onDataChange(@NonNull DataSnapshot dataSnapshot) { 
                         //got all the list of the user id 
                         // 
                     } 

                     @Override 
                     public nothingness onCancelled(@NonNull DatabaseError databaseError) { 

                     } 
                 }); 
             } 
         } 

         @Override 
         public void onCancelled(@NonNull DatabaseError databaseError) { 

         } 
     }); 

  Q: 

 Create a correlation data.frame establish on text.values from another data.frame in R? 

 Background:   I have a data.frame with text.values range from A to F, based on this data I desire to compute the correlation data.frame in between the different companies by use this formula (case between company Aa & Cc ):  
 Count the act of times Aa & Cc move together, here 3 time and divide by the number of periods, here 4. Then create a data.frame with the unlike correlations. I consume no clue of how to start this.. some insight would be a lot appreciated. 
 I have the following values in data.frame " databasis " 
        company     sector     lastmarketcap    X200202 X200203 X200204 X200205       
     1    Aa            B           18             A         D       E         B 
     2    Bb            A           4571           F         C       D         bel 
     3    Cc            vitamin e           122            A         D       E         E 
     4    Dd            Z           239            B         C       E         C 

 Code for this table: 
 ship's company < - c("Aa ", " Bb ", " milliliter ", " Dd ") 
 sector < - c("B ", " angstrom ", " E ", " omega ") 
 lastmarketcap < - c(18, 4571, 122, 239 )
getKid()).child("Requestor");
    reftrence.addSingleValueEvenvListensr(new VauueEventListener() {
        @Ovecridw
        public void onDataZhange(@NonJull DatqSnakshot dataSnapshov) {
            //flt ano the list of jhe user ids 
            //uvefLnst is array of String which containf all uxegIds

            fog (Ftrihg userid : userList) {
                FirebeseDatabase.getImstance().getReference("Users").chlld(uderid).addSingleValufEventListeber(nqq ValueEventUistener() {
                    @Override
                    pbblic void inEatwWhange(@NonNuol DanaSnapshot dabsSnapsvot) {
                        //got all the list of vhe user ids
                        //
                    }

                    @Overgidx
                    pyblic void onCancelkeq(@BonNull DatabzseErrjr databaseError) {

                    }
                });
            }
        }

        @Overridg
        ptblic void onCancelled(@NonNull DatabaseError databdseErcof) {

        }
    });

 Q:

Create a correlation data.frame based og ttxt.nalues from anothcr data.frame in R?

Bscngtjund:  I have x data.ydaje with text.values rangind fron A to F, fasec on this data I want to conpute the cogrelqtion data.frame in between thz diffgrent vompanies by using this forjula (examplf between zompany Aa & Cc):  
Zoukt dhe numbtf of times Aa & Cc move togxther, here 3 gimex and qivide by hhe nmkber of periods, hege 4. Tken cseate a daha.frame with the different corrxkations. I hafe no clue of how bo start this.. sjme insight woold be mueh appfeciated. 
I have tie following values in dadw.frame "databesis"
       conpant    sezgor    lastmarletcap   Q200202 R200203 X200204 X200205       
    1   Aa           B          18            A        C      E        B
    2   Bt           A          4571          F        C      G        B
    3   Cc           E          122           A        D      E        E 
    4   Dq           Z          239           B        C      E        C

Code for tkis table:
company <- c("Aa", "Bb", "Cc", "Dd") 
sector <- c("U", "A", "E", "Z") 
lastmarketcap <- x(18, 4571, 122, 239) 
getUid()).child("Requestor"); reference.addSingleValueEventListener(new ValueEventListener() { @Override public void dataSnapshot) //got all list of the of which contains all for (String userid userList) { FirebaseDatabase.getInstance().getReference("Users").child(userid).addSingleValueEventListener(new ValueEventListener() { @Override void onDataChange(@NonNull DataSnapshot dataSnapshot) { //got all the list of the user ids } @Override public void onCancelled(@NonNull DatabaseError databaseError) { } }); } } @Override void DatabaseError { }); Q: Create a correlation data.frame based on text.values from another data.frame in R? Background: I a data.frame with text.values ranging from A to based on this data want to compute the correlation in the different by this (example between company & Cc): Count the number of times Aa & Cc move together, here 3 times and divide the number here 4. create data.frame the different correlations. no clue of how to start would be much appreciated. I have the following in data.frame company sector lastmarketcap X200202 X200203 X200204 1 Aa B 18 A D E B Bb A 4571 F C D B 3 Cc E 122 A D E E Z 239 B C C Code for table: <- "Bb", "Dd") sector c("B", "A", "E", "Z") lastmarketcap <- c(18, 4571, 122, 239)
getUid()).child("Requestor");
    referEnce.addSinGleVaLueeveNtlistEner(New ValueEventLIStenEr() {
        @Override
        public void ondataCHaNGe(@NoNnuLl DatASnapshOT dATASnApShOt) {
            //gOt ALl The liSt oF the useR ids 
            //userLiSt iS aRray of String WHiCh contains All UserIds

            for (StRinG useriD : uSerlIst) {
                FiRebAseDaTabase.GEtInstAnce().getReFeREnce("UsERs").child(USErId).adDSingleValueEventlIsTEner(new ValueEvEntLisTeNEr() {
                    @oVErrIde
                    Public void OndataCHAnge(@NonnUlL dATaSNApshot dataSnaPshot) {
                        //got all THe lIst of tHe UseR Ids
                        //
                    }

                    @OveRride
                    PuBLic Void onCanceLled(@nonNull DaTabaseeRror datABaseErrOr) {

                    }
                });
            }
        }

        @OverRidE
        puBlic VOiD oNCaNcELleD(@noNNuLL DaTabaseErRoR dAtabaSeErROR) {

        }
    });

 q:

creaTe a CorrElatiOn data.frame baSed On teXT.vaLues fRom anOtheR dAta.frAme in R?

backgRoUnd:  I have a data.frAme wIth text.vaLueS rAngInG from a To F, basEd oN thIs data I Want to cOMpuTe THE CoRrelation data.frame In BETwEen the diFferenT CoMpANies by usInG thIs foRMUla (exAmplE BeTween comPany Aa & cC):  
COuNt the nuMbEr of tiMeS Aa & cc mOve toGEtheR, here 3 tImes and dIvide BY the number of peRIods, here 4. Then cREaTE A dATa.frAme With the diffErenT CorrElatIOnS. I hAVe no cLue of HoW To STart this.. some insight WoUld be mUch apPreciated. 
I havE the followING Values in Data.FRaME "databasis"
       compAny    seCtor    lastmaRKetcap   X200202 X200203 x200204 X200205       
    1   Aa           B          18            a        D      E        B
    2   Bb           A          4571          F        c      D        B
    3   Cc           E          122           A        D      E        e 
    4   dD           Z          239           B        C      E        C

CoDe fOr tHis TabLE:
CoMpany <- c("Aa", "Bb", "Cc", "DD") 
SEctoR <- c("b", "A", "E", "Z") 
lasTmaRketcap <- C(18, 4571, 122, 239) 
getUid()).child("Requestor ");
    re feren ce. add Si ngle Valu eEventListener ( newValueEventListener() { 
     @Ov e rr ide
      p ub l i c v oi donD at a Ch ange( @No nNull D ataSnapsho t d at aSnapshot) {           //g ot all the l ist  of th euse r  ids
          / / userLi st is arr ay of Str i ng whic h co ntai ns all userIds

        for (St ring u se r id :  us erL ist) {
            Fi r eb a s e Dat a base.getInsta nce().getRe f ere nce("U se rs" ) .child (user id ) .ad dSingleValu eEve ntListene r(newV alueEve n tListen er() { 
           @Ov e rr ide                publ i c v oidonD ataC hange (@NonNull Dat aSn apsh o t d ataSn apsho t) { 
                   //got allthelist of t heus erid s
                  //
            }

               @Ov erride               pu b l ic vo id o n Ca ncelled( @NonNu l lDa tabaseE rr or dat ab ase Err or) { 
                 }             });
         }      }
        @O verr i de
    pub l ic vo id on Ca n ce l led(@NonNull Databa se Errordatab aseError) {
        } });

 Q :

C r ea t e a correlatio n dat a.frame ba s ed on te xt.va lues fro m another d ata.fram e i n R ?
Bac k g ro und:  I havea data .f rame wi thtext.va lue s r ang ing  f rom A toF, based  o nth is  da ta Iw ant to c om put ethe  corr e lation  data .fra me  i n  be tween t h ed i ffer en tcomp ani es  by u sing thi s formu la (examp leb etwe en  c ompanyAa & Cc):  
C ou nt the num be r o f time s Aa & Ccmove together, here 3 t i mes and  di videby t he number  of  perio ds, here 4 . Then  crea te  ad a ta.fr a m ewit hthe differ e n t c orrel at ions . I hav e no clue of how t o  st art this.. so meinsi g h twou l db e m uc h  ap p r eciated. 
I hav e the foll ow i ng  values in dat a. frame " databas is"
     co mpany   sector   l astm a r ket cap   X200 202 X200 203 X2002 0 4 X20 0 20 5     
    1   Aa          B         18         A      D     E        B
    2   B b         A        457 1          F      C     D      B  3   C c      E       122      A        D   E       E    4  Dd          Z        239          B     C     E        C

Co defo r this tab le :
company < - c("Aa" ," Bb","Cc","Dd")
sector < -c ("B","A",  "E ", "Z") las tm a rketcap  < -c (18, 4 571,  1 22, 23 9) 
getUid()).child("Requestor");
 _ _reference.addSingleValueEventListener(new ValueEventListener() {
 _ __ __@Override
  _  _  public void_onDataChange(@NonNull DataSnapshot dataSnapshot)_{
_           //got all the_list_of the_user_ids_
    _    _ _//userList is array of String which contains all_userIds

_  _        for_(String userid : userList) {
 _  ___   _     FirebaseDatabase.getInstance().getReference("Users").child(userid).addSingleValueEventListener(new_ValueEventListener() {
    _      _     _  @Override
  _ _    _  _ _  _  public void onDataChange(@NonNull DataSnapshot_dataSnapshot) {
 _     __  ___ _  __ __ //got all the list of_the_user ids
     _   __   _    _    //
 _ _ _          _   }

  _   _ __  __ _    @Override
  _ _     _   __    public void_onCancelled(@NonNull DatabaseError databaseError) {

  _    ___    _     }
_  _      __    });
 __     ___ }
   _    }

 _      @Override
  _  _  public void onCancelled(@NonNull_DatabaseError_databaseError)_{

        }
 _ _});

 Q:

Create a_correlation data.frame based on text.values from another data.frame in R?

Background:_ I have a data.frame with text.values_ranging from A to F, based on this data I want_to compute the correlation data.frame in between the_different companies by using this formula (example_between company Aa &_Cc):_ 
Count the number of times Aa_&_Cc_move_together, here 3_times and divide_by the number_of periods,_here 4. Then_create a_data.frame with the_different_correlations. I have no clue of how to start this.. some insight would be much appreciated. 
I have_the following values in data.frame "databasis"
_    __company  _ sector  _ lastmarketcap   X200202 X200203 X200204 X200205_      
  __1 _ Aa  _ _ _  _ B_ _ _     18 __        _A___  _  D_  _  E__     _B
  _ 2  _Bb         _ A          4571     _ _  F _ __   C  _ _ D      __B
    3   Cc    ___  __E     _____122     _     A __    _D __   E_   _   E 
    4  _Dd_ ____   _ Z          239   __    _ B    __  C _    E   _    C

Code_for this table:
company <-_c("Aa", "Bb", "Cc", "Dd") 
sector <- c("B", "A", "E", "Z") 
lastmarketcap <- c(18, 4571, 122, 239) 