[R] Newbie

Stefan Grosse singularitaet at gmx.net
Thu Aug 16 17:12:33 CEST 2007


> I'm a bit new to the world of R so forgive my ignorance.  

That has nothing to do with the knowledge of R but with the model. Age
has only 2 different values: 0 and 1 and if it is 0 there is no scars,
so what exactly have you expected from the model?

I would say if you just want to prove that older deer have more scars
try the Mann Whitney non parametric test...

Stefan

> I'm trying to do a zero-inflated negative binomial regression and have received an error message and i'm not sure what it means.  I'm running R 2.5.1 on XP.  I have just tried a really simple version of the model to see if it would run before I put all the variables in.  I have attached all the variables to the object alan.
>
> Here is the table:
>
> Date     Location Deer Code   Sex Age Pel Per Lac Scars Emb Lar Nym Bee Mi  Mass
> 1   12/06/2007 Ballysallagh    0   B1 FALSE   1   A   1   1     4   0   0   0   0  0 21.59
> 2   15/06/2007 Ballysallagh    0  B10 FALSE   1   A   1   1     5   0   0   0   0  2 26.19
> 3   15/06/2007 Ballysallagh    0  B12 FALSE   1   A   1   1     0   5   0   0   0  1 28.55
> 4   15/06/2007 Ballysallagh    0  B13 FALSE   1   A   0   1     5   0   0   0   4 45 23.93
> 5   15/06/2007 Ballysallagh    0  B16 FALSE   1   A   1   1     0   4   0   0   0  1 34.19
> 6   15/06/2007 Ballysallagh    0  B17 FALSE   1   A   1   1     5   0   0   0   0  0 25.02
> 7   15/06/2007 Ballysallagh    0  B18 FALSE   1   A   1   1     5   0   0   0   0  7 33.06
> 8   12/06/2007 Ballysallagh    0   B5 FALSE   1   A   1   1     4   0   0   0   0  2 23.55
> 9   12/06/2007 Ballysallagh    0   B6 FALSE   1   A   1   1     4   0   0   0   0  2 22.67
> 10  12/06/2007 Ballysallagh    0   B7 FALSE   1   A   1   1     5   0   0   0   0  2 22.57
> 11  12/06/2007 Ballysallagh    0   B8 FALSE   1   A   1   1     5   0   0   0   0 10 24.01
> 12  24/06/2007      Caledon    1  C12 FALSE   1   A   1   0     0   0   1   0   0  3 21.68
> 13  25/06/2007      Caledon    1  C17 FALSE   1   A   1   0     4   0   1   0   0 23 20.56
> 14  25/06/2007      Caledon    1  C18 FALSE   1   A   1   0     0   0   0   0   2  2 17.47
> 15  25/06/2007      Caledon    1  C20 FALSE   1   A   1   0     8   0   0   0   0  3 19.97
> 16  25/06/2007      Caledon    1  C21 FALSE   1   A   1   0     3   0   2   0   0 20 20.58
> 17  25/06/2007      Caledon    1  C24 FALSE   1   A   1   0     0   4   2   0   0  7 17.37
> 18  25/06/2007      Caledon    1  C27 FALSE   1   A   1   0     0   0   3   0   0  6 24.14
> 19  25/06/2007      Caledon    1  C28 FALSE   1   A   1   0     0   5   1   0   0  6 21.58
> 20  25/06/2007      Caledon    1  C33 FALSE   1   A   0   0     0   0   1   0   0  0 19.06
> 21  25/06/2007      Caledon    1  C35 FALSE   1   A   1   0     3   0   2   0   0 20 24.55
> 22  24/06/2007      Caledon    1   C4 FALSE   1   A   1   1     4   3   0   0   0  5 22.65
> 23  24/06/2007      Caledon    1   C8 FALSE   1   A   0   0     0   0   3   0   0  3 23.08
> 24  01/06/2007 Hillsborough    0  H11 FALSE   1   A   1   1     4   0   0   0   0  0 23.01
> 25  01/06/2007 Hillsborough    0  H16 FALSE   1   A   1   1     5   0   0   0   0  0 18.18
> 26  01/06/2007 Hillsborough    0  H17 FALSE   1   A   1   1     4   0   0   0   0  0 24.45
> 27  01/06/2007 Hillsborough    0  H19 FALSE   1   A   0   1     0   0   0   0   0  3 21.01
> 28  01/06/2007 Hillsborough    0   H2 FALSE   1   A   1   1     5   0   0   0   0  1 24.86
> 29  01/06/2007 Hillsborough    0  H21 FALSE   1   A   1   1     5   0   0   0   0  0 20.48
> 30  01/06/2007 Hillsborough    0  H25 FALSE   1   A   1   1     5   0   0   0   0  0 22.09
> 31  01/06/2007 Hillsborough    0  H26 FALSE   1   A   1   1     5   0   0   0   0  0 20.18
> 32  01/06/2007 Hillsborough    0   H3 FALSE   1   A   0   1     5   0   0   0   0  0 25.82
> 33  01/06/2007 Hillsborough    0  H34 FALSE   1   A   1   0     0   4   0   0   0  1 18.78
> 34  01/06/2007 Hillsborough    0  H35 FALSE   1   A   0   1     4   0   0   0   0  0 20.02
> 35  01/06/2007 Hillsborough    0   H5 FALSE   1   A   0   1     5   0   0   0   0  0 19.58
> 36  01/06/2007 Hillsborough    0   H6 FALSE   1   A   1   1     5   0   0   0   0  6 28.84
> 37  16/06/2007   LoughNavar    1  LN1 FALSE   1   A   1   1     5   0   3   0   0  1 22.71
> 38  16/06/2007   LoughNavar    1 LN10 FALSE   1   A   1   1     5   0   0   0   0  0 23.53
> 39  16/06/2007   LoughNavar    1 LN11 FALSE   1   A   1   1     4   0   0   0   0  2 33.24
> 40  16/06/2007   LoughNavar    1 LN13 FALSE   1   A   1   1     5   0   0   0   0  0 20.20
> 41  16/06/2007   LoughNavar    1 LN14 FALSE   1   A   1   1     0   7   0   0   1  1 31.35
> 42  16/06/2007   LoughNavar    1 LN16 FALSE   1   A   1   1     0   5   0   0   0  2 19.43
> 43  16/06/2007   LoughNavar    1 LN18 FALSE   1   A   1   0     6   0   0   0   0 12 24.30
> 44  16/06/2007   LoughNavar    1 LN23 FALSE   1   A   1   1     5   0   0   0   0  1 24.34
> 45  16/06/2007   LoughNavar    1  LN7 FALSE   1   A   1   1     5   0   1   0   0  0 28.01
> 46  16/06/2007   LoughNavar    1  LN9 FALSE   1   A   1   1     4   0   8   0   0  5 25.43
> 47  11/07/2007   Mt.Stewart    0   M1 FALSE   1   A   1   0     5   0   0   0   0  1 25.31
> 48  11/07/2007   Mt.Stewart    0  M18 FALSE   1   A   1   1     0   0   0   0   0  2 26.66
> 49  11/07/2007   Mt.Stewart    0  M21 FALSE   1   A   0   0     3   0   0   0   0  7 23.70
> 50  11/07/2007   Mt.Stewart    0   M4 FALSE   1   A   1   0     4   0   0   0   0  1 27.05
> 51  05/06/2007  Portglenone    0  P10 FALSE   1   A   1   0     5   0   0   0   1  1 21.08
> 52  05/06/2007  Portglenone    0  P13 FALSE   1   A   1   1     0   5   0   0   0 23 34.07
> 53  05/06/2007  Portglenone    0  P14 FALSE   1   A   1   1     4   0   0   0   0  5 29.00
> 54  05/06/2007  Portglenone    0  P17 FALSE   1   A   1   1     6   0   0   0   0  1 23.61
> 55  11/06/2007  Portglenone    0  P18 FALSE   1   A   1   0     4   0   0   0   1 25 19.76
> 56  11/06/2007  Portglenone    0  P19 FALSE   1   A   1   0     5   0   0   0   0 25 19.13
> 57  05/06/2007  Portglenone    0   P5 FALSE   1   A   1   0     4   0   0   0   0 11 19.10
> 58  05/06/2007  Portglenone    0   P7 FALSE   1   A   1   1     2   0   0   0   0  1 26.02
> 59  29/05/2007  Randalstown    1   R5 FALSE   1   A   1   1     0   0   1   0   3  0 26.70
> 60  30/06/2007     Somerset    0  S14 FALSE   1   A   1   0     0   4   0   0   0  3 22.20
> 61  30/06/2007     Somerset    0  S15 FALSE   1   A   1   1     4   0   0   0   1 11 33.36
> 62  30/06/2007     Somerset    0  S17 FALSE   1   A   1   0     3   0   0   0   0  1 27.10
> 63  30/06/2007     Somerset    0   S2 FALSE   1   A   1   0     0   0   0   0   2  4 27.87
> 64  03/07/2007     Somerset    0  S25 FALSE   1   A   1   0     6   0   0   0   0  2 27.34
> 65  03/07/2007     Somerset    0  S28 FALSE   1   A   1   0     5   0   0   0   0  4 23.83
> 66  03/07/2007     Somerset    0  S29 FALSE   1   A   1   0     4   4   0   0   0  4 21.51
> 67  03/07/2007     Somerset    0  S31 FALSE   1   A   1   0     4   0   0   0   0 17 27.01
> 68  03/07/2007     Somerset    0  S35 FALSE   1   A   0   0     0   0   0   0   0  2 15.60
> 69  30/06/2007     Somerset    0   S7 FALSE   1   A   1   1     0   0   0   0   0  5 25.58
> 70  30/06/2007     Somerset    0   S9 FALSE   1   A   1   1     4   0   0   0   0  3 31.87
> 71  29/05/2007    Tollymore    1  T13 FALSE   1   A   1   0     0   0   1   0   0  0 20.24
> 72  29/05/2007    Tollymore    1  T16 FALSE   1   A   0   0     0   4   9   0   0  1 17.43
> 73  29/05/2007    Tollymore    1  T19 FALSE   1   A   1   0     5   0   3   0   0  0 19.50
> 74  29/05/2007    Tollymore    1  T23 FALSE   1   A   1   0     0   5   6   0   0  1 18.67
> 75  29/05/2007    Tollymore    1  T24 FALSE   1   A   1   0     0   0   0   0   0  2 16.55
> 76  29/05/2007    Tollymore    1  T30 FALSE   1   A   1   0     0   0   2   0   0  2 20.88
> 77  29/05/2007    Tollymore    1   T4 FALSE   1   A   1   0     0   0   3   0   2  0 16.43
> 78  29/05/2007    Tollymore    1   T6 FALSE   1   A   1   0     0   5  28   0   4  0 17.50
> 79  29/05/2007    Tollymore    1   T9 FALSE   1   A   1   0     4   0   3   0   0  0 20.58
> 80  15/07/2007  Tullychurry    1  TC1 FALSE   1   A   1   0     0   0   9   0   0  0 25.27
> 81  16/07/2007  Tullychurry    1 TC12 FALSE   1   A   1   0     5   0  44   1   0  4 24.83
> 82  16/07/2007  Tullychurry    1 TC15 FALSE   1   A   1   0     5   0   5   0   0 14 22.28
> 83  16/07/2007  Tullychurry    1 TC18 FALSE   1 A/J   0   0     0   0  15   0   9  0 13.87
> 84  16/07/2007  Tullychurry    1 TC23 FALSE   1   A   1   0     0   4  23   0   0  1 27.00
> 85  15/07/2007  Tullychurry    1  TC3 FALSE   1   A   0   1     6   0  75   0   0  4 22.43
> 86  15/07/2007  Tullychurry    1  TC4 FALSE   1   A   1   0     0   5  16   0   0  1 26.73
> 87  15/07/2007  Tullychurry    1  TC6 FALSE   1   A   1   0     2   0   5   0   0  8 21.28
> 88  15/07/2007  Tullychurry    1  TC7 FALSE   1   A   1   1     6   0  42   0   1  1 28.55
> 89  15/07/2007  Tullychurry    1  TC8 FALSE   1   A   1   0     3   0   3   0   0  0 20.13
> 90  15/06/2007 Ballysallagh    0  B11 FALSE   0 A/J   0   0     0   0   0   0   0  0 13.82
> 91  24/06/2007      Caledon    1  C16 FALSE   0   J   0   0     0   0   0   0   0  3  8.40
> 92  20/06/2007      Caledon    1   C2 FALSE   0   J   0   0     0   0   0   0   0  0  8.08
> 93  16/06/2007   LoughNavar    1  LN2 FALSE   0 A/J   0   0     0   0   0   0   0  2  8.71
> 94  18/06/2007   LoughNavar    1 LN27 FALSE   0   A   0   0     0   0   0   0   0  1 16.90
> 95  18/06/2007   LoughNavar    1 LN34 FALSE   0   J   0   0     0   0   0   0   1  2  9.38
> 96  11/07/2007   Mt.Stewart    0  M10 FALSE   0   J   0   0     0   0   0   0   0  2 12.52
> 97  11/07/2007   Mt.Stewart    0  M12 FALSE   0   A   0   0     0   0   0   0   0  6 16.18
> 98  11/07/2007   Mt.Stewart    0   M3 FALSE   0   J   0   0     0   0   0   0   0  5 11.42
> 99  15/05/2007  Randalstown    1   R1 FALSE   0   A   0   0     0   4  44   0   4  0 15.72
> 100 11/06/2007  Randalstown    1  R19 FALSE   0   A   0   0     0   0   2   0   0  7 15.20
> 101 30/06/2007     Somerset    0  S12 FALSE   0   A   0   0     0   0   0   0   1  7 14.04
> 102 03/07/2007     Somerset    0  S19 FALSE   0   A   0   0     0   0   0   0   0  3 15.00
> 103 29/05/2007    Tollymore    1  T11 FALSE   0   A   1   0     0   0   2   0   3  0 16.30
> 104 29/05/2007    Tollymore    1  T28 FALSE   0   A   0   0     0   0   0   0   0  0 14.49
>
> And here is the syntax is used to run the ZINB with the error message, any help greatly appreciated.
>
>   
>> zinb.zc<- zicounts(resp=Scars~.,x=~Age,z=~Age, data=alan)
>>     
> Error in solve.default(z0$hessian) : system is computationally singular: reciprocal condition number = 3.44599e-18
>
>
> Cheers
> Alan
>
> Alan Harrison
>
> Quercus
> Queen's University Belfast
> MBC, 97 Lisburn Road
> Belfast
>
> BT9 7BL
>
> T: 02890 972219
> M: 07798615682
>
>
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