[R] Missing rows anova

[Justin Thong]

Why does the S:x1 column disappear (presumably S:x1 goes into ID but I dont
know why)? S is a factor, x1 is a covariate and ID is a factor.

    rich.side<-aov(y~S*x1+ID)
    summary(rich.side)

Below is the model frame

    model.frame(~S*x1+ID)

        S x1  ID
    1   1 12   A
    2   1 12   A
    3   1 12   A
    4   1 12   A
    5   1  0   B
    6   1  0   B
    7   1  0   B
    8   1  0   B
    9   1  0   C
    10  1  0   C
    11  1  0   C
    12  1  0   C
    13  1  0   D
    14  1  0   D
    15  1  0   D
    16  1  0   D
    17  1  0   E
    18  1  0   E
    19  1  0   E
    20  1  0   E
    21  1  0   F
    22  1  0   F
    23  1  0   F
    24  1  0   F
    25  2  6  AB
    26  2  6  AB
    27  2  6  AB
    28  2  6  AB
    29  2  6  AC
    30  2  6  AC
    31  2  6  AC
    32  2  6  AC
    33  2  6  AD
    34  2  6  AD
    35  2  6  AD
    36  2  6  AD
    37  2  6  AE
    38  2  6  AE
    39  2  6  AE
    40  2  6  AE
    41  2  6  AF
    42  2  6  AF
    43  2  6  AF
    44  2  6  AF
    45  2  0  BC
    46  2  0  BC
    47  2  0  BC
    48  2  0  BC
    49  2  0  BD
    50  2  0  BD
    51  2  0  BD
    52  2  0  BD
    53  2  0  BE
    54  2  0  BE
    55  2  0  BE
    56  2  0  BE
    57  2  0  BF
    58  2  0  BF
    59  2  0  BF
    60  2  0  BF
    61  2  0  CD
    62  2  0  CD
    63  2  0  CD
    64  2  0  CD
    65  2  0  CE
    66  2  0  CE
    67  2  0  CE
    68  2  0  CE
    69  2  0  CF
    70  2  0  CF
    71  2  0  CF
    72  2  0  CF
    73  2  0  DE
    74  2  0  DE
    75  2  0  DE
    76  2  0  DE
    77  2  0  DF
    78  2  0  DF
    79  2  0  DF
    80  2  0  DF
    81  2  0  EF
    82  2  0  EF
    83  2  0  EF
    84  2  0  EF
    85  3  4 ABC
    86  3  4 ABC
    87  3  4 ABC
    88  3  4 ABC
    89  3  4 ABD
    90  3  4 ABD
    91  3  4 ABD
    92  3  4 ABD
    93  3  4 ABE
    94  3  4 ABE
    95  3  4 ABE
    96  3  4 ABE
    97  3  4 ABF
    98  3  4 ABF
    99  3  4 ABF
    100 3  4 ABF
    101 3  4 ACD
    102 3  4 ACD
    103 3  4 ACD
    104 3  4 ACD
    105 3  4 ACE
    106 3  4 ACE
    107 3  4 ACE
    108 3  4 ACE
    109 3  4 ACF
    110 3  4 ACF
    111 3  4 ACF
    112 3  4 ACF
    113 3  4 ADE
    114 3  4 ADE
    115 3  4 ADE
    116 3  4 ADE
    117 3  4 ADF
    118 3  4 ADF
    119 3  4 ADF
    120 3  4 ADF
    121 3  4 AEF
    122 3  4 AEF
    123 3  4 AEF
    124 3  4 AEF
    125 3  0 BCD
    126 3  0 BCD
    127 3  0 BCD
    128 3  0 BCD
    129 3  0 BCE
    130 3  0 BCE
    131 3  0 BCE
    132 3  0 BCE
    133 3  0 BCF
    134 3  0 BCF
    135 3  0 BCF
    136 3  0 BCF
    137 3  0 BDE
    138 3  0 BDE
    139 3  0 BDE
    140 3  0 BDE
    141 3  0 BDF
    142 3  0 BDF
    143 3  0 BDF
    144 3  0 BDF
    145 3  0 BEF
    146 3  0 BEF
    147 3  0 BEF
    148 3  0 BEF
    149 3  0 CDE
    150 3  0 CDE
    151 3  0 CDE
    152 3  0 CDE
    153 3  0 CDF
    154 3  0 CDF
    155 3  0 CDF
    156 3  0 CDF
    157 3  0 CEF
    158 3  0 CEF
    159 3  0 CEF
    160 3  0 CEF
    161 3  0 DEF
    162 3  0 DEF
    163 3  0 DEF
    164 3  0 DEF

-- 
Yours sincerely,
Justin

*I check my email at 9AM and 4PM everyday*
*If you have an EMERGENCY, contact me at +447938674419(UK) or
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