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st: graphing margins in Stata 11
From
"Valle, Giuseppina" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: graphing margins in Stata 11
Date
Mon, 9 Sep 2013 16:59:20 +0000
Hello. I am trying to graph the results of a categorical by continuous interaction from a logistic regression model in Stata 11 (I do not access to Stata 12 to use the marginsplot command). My categorical predictor has 3 categories and my continuous predictor has a max value of 50. I have used the code below without error:
margins vaginal, at(numpart=(1(1)50)) vsquish
matrix b=r(b)'
matrix list b
matrix at=r(at)
matrix list at
However, for the next step, I use the code:
matrix at=at[1...,"numpart"]#(1\2\3)
matrix list at
I get the following:
at[150,1]
numpart:
c1
r1:r1 1
r1:r2 2
r1:r3 3
r2:r4 2
r2:r5 4
r2:r6 6
r3:r7 3
r3:r8 6
r3:r9 9
r4:r10 4
r4:r11 8
r4:r12 12
r5:r13 5
r5:r14 10
r5:r15 15
r6:r16 6
r6:r17 12
r6:r18 18
r7:r19 7
r7:r20 14
r7:r21 21
r8:r22 8
r8:r23 16
r8:r24 24
r9:r25 9
r9:r26 18
r9:r27 27
r10:r28 10
r10:r29 20
r10:r30 30
r11:r31 11
r11:r32 22
r11:r33 33
r12:r34 12
r12:r35 24
r12:r36 36
r13:r37 13
r13:r38 26
r13:r39 39
r14:r40 14
r14:r41 28
r14:r42 42
r15:r43 15
r15:r44 30
r15:r45 45
r16:r46 16
r16:r47 32
r16:r48 48
r17:r49 17
r17:r50 34
r17:r51 51
r18:r52 18
r18:r53 36
r18:r54 54
r19:r55 19
r19:r56 38
r19:r57 57
r20:r58 20
r20:r59 40
r20:r60 60
r21:r61 21
r21:r62 42
r21:r63 63
r22:r64 22
r22:r65 44
r22:r66 66
r23:r67 23
r23:r68 46
r23:r69 69
r24:r70 24
r24:r71 48
r24:r72 72
r25:r73 25
r25:r74 50
r25:r75 75
r26:r76 26
r26:r77 52
r26:r78 78
r27:r79 27
r27:r80 54
r27:r81 81
r28:r82 28
r28:r83 56
r28:r84 84
r29:r85 29
r29:r86 58
r29:r87 87
r30:r88 30
r30:r89 60
r30:r90 90
r31:r91 31
r31:r92 62
r31:r93 93
r32:r94 32
r32:r95 64
r32:r96 96
r33:r97 33
r33:r98 66
r33:r99 99
r34:r100 34
r34:r101 68
r34:r102 102
r35:r103 35
r35:r104 70
r35:r105 105
r36:r106 36
r36:r107 72
r36:r108 108
r37:r109 37
r37:r110 74
r37:r111 111
r38:r112 38
r38:r113 76
r38:r114 114
r39:r115 39
r39:r116 78
r39:r117 117
r40:r118 40
r40:r119 80
r40:r120 120
r41:r121 41
r41:r122 82
r41:r123 123
r42:r124 42
r42:r125 84
r42:r126 126
r43:r127 43
r43:r128 86
r43:r129 129
r44:r130 44
r44:r131 88
r44:r132 132
r45:r133 45
r45:r134 90
r45:r135 135
r46:r136 46
r46:r137 92
r46:r138 138
r47:r139 47
r47:r140 94
r47:r141 141
r48:r142 48
r48:r143 96
r48:r144 144
r49:r145 49
r49:r146 98
r49:r147 147
r50:r148 50
r50:r149 100
r50:r150 150
It seems as if something is incorrect. As previously mentioned, "numpart" has a max value of 50, but here I am getting a values of 150. In the example online(http://www.ats.ucla.edu/stat/stata/faq/mar_graph/margins_graph.htm), I should get values of 1 through 50 in the "c1" column.
Any advice on this matter would be greatly appreciated!
Thank you in advance,
Pina Valle
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