Thanks a lot, it works perfectly!
f.
----------------------------------
Francesca Pancotto
Università degli Studi di Modena e Reggio Emilia
Palazzo Dossetti - Viale Allegri, 9 - 42121 Reggio Emilia
Office: +39 0522 523264
Web: https://sites.google.com/site/francescapancotto/
----------------------------------

Il giorno 17/feb/2014, alle ore 09:57, arun <smartpink...@yahoo.com> ha scritto:

> Sorry, a typo: vec3 instead of vec2
> 
>  dat3 <- 
> data.frame(bank_name=vec3,p_for=rep(seq(18),length(unique(dat$bank_name))))
> A.K.
> 
> 
> 
> 
> On , arun <smartpink...@yahoo.com> wrote:
> Hi,
> 
> Looks like one column name is missing.  I am not sure about the output you 
> wanted.  May be this helps.
> 
> 
> dat <- read.table(text="row.names bank_name      date px_last      Q_Y p_made 
> q_made        p_for 
> 1          2        1  11/30/06    1.31 p406-q406    406  406          1      
>    
> 2        47        1  02/26/09    1.27 p109-q109    109  109          10
> 3        55        1 06/08/2009    1.40 p209-q209    209  209         11
> 4        68        1 12/01/2009    1.51 p409-q409    409  409         13
> 5        87        1  05/26/10    1.22 p210-q210    210  210          15
> 6        96        1  7/22/2010    1.25 p310-q310    310  310          16
> 7        221        2  11/14/06    1.30 p406-q406    406  406          1   
> 8        16        2  02/13/07    1.27 p107-q107    107  107          2 
> 9        31        2  5/15/2007    1.36 p207-q207    207  207          3
> 10      222        3 11/29/2007    1.50 p407-q407    407  407      5   
> 11      1110        3  02/25/08    1.48 p108-q108    108  108      6   
> 12        6        4  02/15/07    1.35 p107-q107    107  107          2   
> 13        18        4  5/24/2007    1.39 p207-q207    207  207          3
> 14      292        4  08/21/07    1.39 p307-q307    307  307      4  
> 15        38        4 11/29/2007    1.49 p407-q407    407  407      5 
> 16        49        4  01/28/08    1.43 p108-q108    108  108          6
> 17        61        4  05/15/08    1.52 p208-q208    208  208          7   
> 18        71        4  08/18/08    1.45 p308-q308    308  308          8   
> 19        78        4  11/20/08    1.30 p408-q408    408  408          9
> 20        88        4  02/19/09    1.35 p109-q109    109  109          10
> 21      941        4  05/28/09    1.35 p209-q209    209  209          
> 11",sep="",header=TRUE,stringsAsFactors=FALSE)
> ##Possible solution 1
> 
>  tbl <- table(dat$bank_name)
>  dat2 <- 
> data.frame(bank_name=as.numeric(rep(names(tbl),max(tbl)-tbl)),p_for=NA)
>  res1 <- merge(dat,dat2,all=TRUE)[colnames(dat)]
>  table(res1$bank_name)
> #
> # 1  2  3  4 
> #10 10 10 10 
> 
> 
> ###2
> 
> 
> vec1 <- with(dat,tapply(p_for,list(bank_name),FUN=max))
>  vec2 <- as.numeric(rep(names(vec1),each=max(vec1)))
> dat2New <- data.frame(bank_name=vec2,p_for=rep(seq(max(vec1)),4))
> res2 <- merge(dat,dat2New,all=TRUE)[colnames(dat)]
>  table(res2$bank_name)
> #
> # 1  2  3  4 
> #16 16 16 16 
> 
> #or 
> 
> ####3
> 
> #using 18 as mentioned in the description
> 
> vec3 <- rep(unique(dat$bank_name),each=18)
> dat3 <- 
> data.frame(bank_name=vec2,p_for=rep(seq(18),length(unique(dat$bank_name))))
> res3 <- merge(dat,dat3,all=TRUE)[colnames(dat)]
> table(res3$bank_name)
> 
> # 1  2  3  4 
> #18 18 18 18 
> 
> A.K.
> 
> 
> 
> 
> 
> On Monday, February 17, 2014 2:40 AM, Francesca Pancotto 
> <francesca.panco...@gmail.com> wrote:
> Dear R contributors, 
> I have a problem with a database that at the moment I find hard to solve.
> 
> I have a panel composed of n subjects, whose names in the table that I report 
> is bank_name,
> and observations for each of the individuals  of bank_name from 1 to 18, as 
> reported from the column p_for.
> As you can see from p_for, there are missing values in the panel that are not 
> present and that create problems to my estimation.
> Do you know an efficient way to introduce missing values in the rows of the 
> panel so that each cross section bank_name has the same number of observations
> p_for, even though some of them are NA?
> Thanks for any help you can provide,
> 
> Best,
> 
> Francesca
> 
> 
> row.names bank_name       date px_last       Q_Y p_made         p_for 
> 1          2         1   11/30/06    1.31 p406-q406    406   406           1  
>          
> 2         47         1   02/26/09    1.27 p109-q109    109   109          10  
> 3         55         1 06/08/2009    1.40 p209-q209    209   209          11  
> 4         68         1 12/01/2009    1.51 p409-q409    409   409          13  
> 5         87         1   05/26/10    1.22 p210-q210    210   210          15  
> 6         96         1  7/22/2010    1.25 p310-q310    310   310          16  
> 7        221         2   11/14/06    1.30 p406-q406    406   406           1  
>   
> 8         16         2   02/13/07    1.27 p107-q107    107   107           2  
> 9         31         2  5/15/2007    1.36 p207-q207    207   207           3  
> 10       222         3 11/29/2007    1.50 p407-q407    407   407       5    
> 11      1110         3   02/25/08    1.48 p108-q108    108   108       6    
> 12         6         4   02/15/07    1.35 p107-q107    107   107           2  
>   
> 13        18         4  5/24/2007    1.39 p207-q207    207   207           3  
> 14       292         4   08/21/07    1.39 p307-q307    307   307       4    
> 15        38         4 11/29/2007    1.49 p407-q407    407   407       5  
> 16        49         4   01/28/08    1.43 p108-q108    108   108           6  
> 17        61         4   05/15/08    1.52 p208-q208    208   208           7  
>   
> 18        71         4   08/18/08    1.45 p308-q308    308   308           8  
>   
> 19        78         4   11/20/08    1.30 p408-q408    408   408           9  
> 20        88         4   02/19/09    1.35 p109-q109    109   109          10  
> 21       941         4   05/28/09    1.35 p209-q209    209   209          11  
>  ----------------------------------
> Francesca Pancotto
> Università degli Studi di Modena e Reggio Emilia
> Palazzo Dossetti - Viale Allegri, 9 - 42121 Reggio Emilia
> Office: +39 0522 523264
> Web: https://sites.google.com/site/francescapancotto/
> ----------------------------------
> 
> 
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> 
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