# [R] is there an inverse method for table()?

Tue Mar 9 17:03:58 CET 2010

```Sorry, I mean to say:

z <- rep(x, y)

Ravi.

____________________________________________________________________

Assistant Professor,
Division of Geriatric Medicine and Gerontology
School of Medicine
Johns Hopkins University

Ph. (410) 502-2619

----- Original Message -----
Date: Tuesday, March 9, 2010 11:02 am
Subject: Re: [R] is there an inverse method for table()?
To: vincent laperriere <vincent_laperriere at yahoo.fr>
Cc: r-help at r-project.org

> z <- rep(x, each = y)
>
>  Hope this helps,
>  Ravi.
>
>  ____________________________________________________________________
>
>  Assistant Professor,
>  Division of Geriatric Medicine and Gerontology
>  School of Medicine
>  Johns Hopkins University
>
>  Ph. (410) 502-2619
>
>
>  ----- Original Message -----
>  From: vincent laperriere <vincent_laperriere at yahoo.fr>
>  Date: Tuesday, March 9, 2010 10:59 am
>  Subject: [R] is there an inverse method for table()?
>  To: r-help at r-project.org
>
>
>  > Hi,
>  >
>  >  In R, I know the method table(), which builds a contingency table
> of
>  > the counts y at each level for the factor x.
>  >  But I would like to know what is the inverse method of table(), if
> it
>  > exists, to obtain the vector z, from the two vectors x and y?
>  >
>  >  x <- (86,  90,  94,  98, 102, 106, 110, 114, 118, 122, 126, 130,
> 134,
>  > 138, 142, 146, 150, 154, 158, 162, 166, 170, 174)
>  >  y <- c(2, 5, 10, 17, 26, 60, 94, 128, 137, 128, 77, 68, 65, 60,
> 51,
>  > 26, 17, 9, 5, 2, 3, 7, 3)
>  >
>  >  > z
>  >     [1]  86  86  90  90  90  90  90  94  94  94  94  94  94  94  94
>
>  > 94  94  98  98  98  98  98  98  98  98  98  98  98  98  98  98  98
> 98
>  >  98 102 102 102 102 102
>  >    [40] 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102
>
>  > 102 102 102 102 102 102...
>  >    [976] ...170 170 170 170 170 170 170 174 174 174
>  >
>  >  If such a method does not exist, what code should I type to obtain
>
>  > the complete series quickly?
>  >
>  >  Thank you for your help.
>  >  I use version 2.10-1 2009-08-24 for Mac OS.
>  >
>  >  Vincent Laperrière.
>  >
>  >
>  >
>  >  	[[alternative HTML version deleted]]
>  >
>  > ______________________________________________
>  >  R-help at r-project.org mailing list
>  >
>  >  PLEASE do read the posting guide  >  and provide commented, minimal, self-contained, reproducible code.
>

```