[R] Missing rows anova
Michael Dewey
lists at dewey.myzen.co.uk
Tue Jul 19 17:19:36 CEST 2016
Presumably it disappears because there is a unique value of ID for eac
combination of S*x1 so they are indistinguishable.
On 19/07/2016 12:53, Justin Thong wrote:
> 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
>
--
Michael
http://www.dewey.myzen.co.uk/home.html
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