[R] Help on 'find.BIB' function

[Chuck Cleland]

Jason Parcon wrote:
> Hello everyone,
>    
>   I am trying to use the 'find.BIB' function to construct a balanced incomplete block design.  When I ran the example given in the help file (find.BIB(10,30,4)), I obtained the following error message:
>    
>   Error in optBlock(~., withinData = factor(1:trt), blocksize = rep(k, b)) : 
>         object ".Random.seed" not found
> 
>   I investigated what the optBlock function is doing but the manual / help files did not give me any information regarding the above error.
>    
>   I hope somebody can help me regarding this matter.

  The following seems to work for me:

> library(crossdes)
Loading required package: AlgDesign
Loading required package: gtools
Loading required package: MASS

> set.seed(671969)

> find.BIB(10,30,4)
      [,1] [,2] [,3] [,4]
 [1,]    4    5    7   10
 [2,]    1    2    3   10
 [3,]    1    5    6   10
 [4,]    2    8    9   10
 [5,]    3    5    6    7
 [6,]    3    4    9   10
 [7,]    1    5    8    9
 [8,]    1    6    7    9
 [9,]    1    2    4    7
[10,]    2    6    8   10
[11,]    2    3    5    7
[12,]    1    6    7    9
[13,]    2    6    7   10
[14,]    1    2    3    9
[15,]    2    5    6    8
[16,]    2    4    5    9
[17,]    3    4    6    8
[18,]    1    5    8   10
[19,]    2    4    7    8
[20,]    3    6    9   10
[21,]    1    2    4    6
[22,]    3    7    8   10
[23,]    2    3    5    9
[24,]    1    4    5   10
[25,]    4    6    8    9
[26,]    4    7    9   10
[27,]    1    3    7    8
[28,]    3    4    5    6
[29,]    5    7    8    9
[30,]    1    3    4    8

  I get the same error you report if I don't do the set.seed() step.

> sessionInfo()
R version 2.4.1 Patched (2007-03-31 r41127)
i386-pc-mingw32

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
[7] "base"

other attached packages:
 crossdes      MASS    gtools AlgDesign
  "1.0-7"  "7.2-33"   "2.3.1"   "1.0-7"

>   Best regards,
>    
>   Jason Parcon
>    
> 
>        
> ---------------------------------
> 
> 
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> 
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-- 
Chuck Cleland, Ph.D.
NDRI, Inc.
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