R help - Mar 2010 - error with adaboost: replacement has 186 rows, data has 62

Hi, all,

When running > AB.fit=adaboost(ylearn, xlearn, xtest, presel=0) I got the 
following error: 

Error in `[[<-.data.frame`(`*tmp*`, preds, value = c(4L, 6L, 6L, 6L, 3L, : 


  replacement has 186 rows, data has 62 

The data structure is attached below: 

[1] "ylearn" 
 [1] 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 

0 0 0 0 
[40] 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 

[1] "xlearn" 
    rs2289472 rs1551398 rs7927894 
X18 "CT"      "AA"      "CT" 
X19 "TT"      "AA"      "CC" 
X33 "TT"      "AG"      "TT" 
X35 "TT"      "AA"      "CT" 
X36 "CC"      "AA"      "CT" 
X41 "CT"      "AA"      "CT" 
X46 "TT"      "AA"      "CT" 
X65 "CT"      "AG"      "CT" 
X77 "CC"      "AA"      "CT" 
X25 "TT"      "AG"      "TT" 
X26 "CT"      "GG"      "CC" 
X53 "CT"      "GG"      "CC" 
X55 "CT"      "AG"      "CC" 
X57 "CT"      "AG"      "TT" 
X71 "CT"      "AA"      "CT" 
X4  "TT"      "AA"      "CT" 
X7  "CT"      "AG"      "CT" 
X21 "TT"      "AA"      "CT" 
X22 "TT"      "AA"      "TT" 
X31 "CT"      "AG"      "CT" 
X32 "CT"      "AG"      "TT" 
X37 "CT"      "AA"      "CT" 
X50 "TT"      "AA"      "CT" 
X66 "CC"      "AA"      "CC" 
X28 "CT"      "AG"      "CC" 
X29 "CT"      "AG"      "CT" 
X30 "CT"      "GG"      "CT" 
X56 "CT"      "AG"      "CC" 
X62 "CT"      "GG"      "CC" 
X63 "TT"      "GG"      "CT" 
X1  "CT"      "AG"      "CT" 
X3  "TT"      "AG"      "TT" 
X8  "CC"      "GG"      "CC" 
X9  "TT"      "AA"      "CT" 
X38 "CT"      "GG"      "TT" 
X40 "TT"      "AG"      "CT" 
X43 "CT"      "AG"      "CC" 
X45 "TT"      "AA"      "CC" 
X47 "TT"      "AA"      "TT" 
X11 "TT"      "AA"      "TT" 
X13 "CT"      "GG"      "CT" 
X15 "CT"      "AG"      "TT" 
X16 "TT"      "AA"      "CT" 
X27 "CT"      "AG"      "CC" 
X58 "TT"      "AG"      "CC" 
X70 "CT"      "AA"      "CC" 
X2  "CC"      "AA"      "CT" 
X6  "CT"      "AA"      "CT" 
X10 "CC"      "AA"      "CC" 
X14 "TT"      "AA"      "TT" 
X39 "TT"      "GG"      "CT" 
X44 "CT"      "AG"      "CT" 
X49 "TT"      "AG"      "TT" 
X51 "TT"      "AA"      "CT" 
X67 "CT"      "AA"      "CC" 
X12 "CT"      "AG"      "CT" 
X54 "CT"      "AG"      "CC" 
X61 "CT"      "AA"      "CC" 
X68 "CT"      "AG"      "CC" 
X69 "CT"      "AG"      "TT" 
X73 "TT"      "AA"      "CC" 
X74 "TT"      "GG"      "CT" 

[1] "xtest" 
   rs2289472 rs1551398 rs7927894 
5  "TT"      "AA"      "TT" 
20 "CT"      "AG"      "CC" 
23 "CT"      "AG"      "CT" 
24 "CC"      "GG"      "TT" 
34 "CC"      "AA"      "TT" 
42 "CT"      "AA"      "CT" 
48 "CC"      "AG"      "CC" 
59 "CT"      "AA"      "CC" 
75 "CT"      "AG"      "CT" 
17 "CT"      "AG"      "CT" 
52 "CT"      "AA"      "TT" 
60 "CT"      "AG"      "CT" 
64 "TT"      "AA"      "CT" 
72 "TT"      "AG"      "CT" 
76 "TT"      "AA"      "CT" 

do you know what's the protential problem? Thanks in advance. 

Xumin 

	[[alternative HTML version deleted]]