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

Tue Mar 9 17:02:34 CET 2010

rep() is your friend.

HTH,

Thierry

> x <- c(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)
> rep(x, y)
   [1]  86  86  90  90  90  90  90  94  94  94  94  94  94  94  94  94  94  98
  [19]  98  98  98  98  98  98  98  98  98  98  98  98  98  98  98  98 102 102
  [37] 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102
  [55] 102 102 102 102 102 102 106 106 106 106 106 106 106 106 106 106 106 106
  [73] 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106
  [91] 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106 106
 [109] 106 106 106 106 106 106 106 106 106 106 106 106 110 110 110 110 110 110
 [127] 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110
 [145] 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110
 [163] 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110
 [181] 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110
 [199] 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 114 114
 [217] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [235] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [253] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [271] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [289] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [307] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [325] 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114 114
 [343] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [361] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [379] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [397] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [415] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [433] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [451] 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118 118
 [469] 118 118 118 118 118 118 118 118 118 118 118 122 122 122 122 122 122 122
 [487] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [505] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [523] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [541] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [559] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [577] 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122 122
 [595] 122 122 122 122 122 122 122 122 122 122 122 122 122 126 126 126 126 126
 [613] 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126
 [631] 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126
 [649] 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126
 [667] 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126
 [685] 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130
 [703] 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130
 [721] 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130
 [739] 130 130 130 130 130 130 130 130 130 130 130 130 130 130 134 134 134 134
 [757] 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134
 [775] 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134
 [793] 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134 134
 [811] 134 134 134 134 134 134 134 138 138 138 138 138 138 138 138 138 138 138
 [829] 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138
 [847] 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138
 [865] 138 138 138 138 138 138 138 138 138 138 138 138 138 142 142 142 142 142
 [883] 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142
 [901] 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142 142
 [919] 142 142 142 142 142 142 142 142 142 142 146 146 146 146 146 146 146 146
 [937] 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146 146
 [955] 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 154
 [973] 154 154 154 154 154 154 154 154 158 158 158 158 158 162 162 166 166 166
 [991] 170 170 170 170 170 170 170 174 174 174

----------------------------------------------------------------------------
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen
Belgium

Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium

tel. + 32 54/436 185
Thierry.Onkelinx op inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

> -----Oorspronkelijk bericht-----
> Van: r-help-bounces op r-project.org 
> [mailto:r-help-bounces op r-project.org] Namens vincent laperriere
> Verzonden: dinsdag 9 maart 2010 16:58
> Aan: r-help op r-project.org
> Onderwerp: [R] is there an inverse method for table()?
> 
> 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]]
> 
> 

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