Data on dermal ridge counts in left and right hand in (nuclear) families

Format

Data on dermal ridge counts (left and right hand) in 18 monozygotic twin pairs.

Source

Sarah B. Holt (1952). Genetics of dermal ridges: bilateral asymmetry in finger ridge-counts. Annals of Eugenics 17 (1), pp.211--231. DOI: 10.1111/j.1469-1809.1952.tb02513.x

Examples

data(dermalridgesMZ)
fast.reshape(dermalridgesMZ,id="id",varying=c("left","right"))
#>       sex left1 right1              group id left2 right2
#> 1  female    95     83 psychotic&neurotic  1    90     85
#> 3  female    93     90 psychotic&neurotic  2    80     80
#> 5    male    99     94 psychotic&neurotic  3    94     99
#> 7  female    55     61 psychotic&neurotic  4    48     54
#> 9  female    41     24 psychotic&neurotic  5    26     42
#> 11   male    39     38 psychotic&neurotic  6    49     38
#> 13 female    69     81 psychotic&neurotic  7    81     71
#> 15   male    78     72 psychotic&neurotic  8    77     77
#> 17   male    64     64 psychotic&neurotic  9    69     55
#> 19   male    74     83 psychotic&neurotic 10    78     87
#> 21 female    37     34 psychotic&neurotic 11    27     46
#> 23 female    39     45 psychotic&neurotic 12    45     53
#> 25 female    62     62             normal 13    69     66
#> 27   male    92     95             normal 14    90     89
#> 29 female    97     90             normal 15    92     99
#> 31 female    28     44             normal 16    44     48
#> 33 female    53     59             normal 17    51     53
#> 35   male    62     60             normal 18    56     51