During the use of codelink package to process raw codelink data, I got into some confusion when I look at the processed data. The processed data I got from GEO has four columns as below.

       ID       SignalIntensity   SNR
1   109       7.5804349594   1.3421827372
2   110       11.2698560261  9.7509784076
3   111       8.6006358676   1.804853485
4   112       9.5435575539   3.2013768505
5   113       10.181235138   4.6459936834
6   114       8.1168949395   1.4226360984
7   116       8.4670495571   1.8682653573
8   117       8.2733657566   1.6663830675
9   118       5.4203308081   0.6769947295
10  119       8.5379673202   1.8326649796
11  120       9.7949416719   4.0503974531
12  121       5.9770829707   0.7442132887
13  123       5.7623248946   0.7208574513
14  124       5.3253576296   0.6793816015
15  125       8.3676877563   1.6437990197

Now I got raw data from GEO and tried to process it by codelink package with the following code

library(codelink)
codelink_processed <- list()
f = list.files(pattern = "TXT")
codelink_data <- function(data)
{
  for(i in 1:length(f))
  {
    codset = readCodelinkSet(filename = f[[i]])
    codset = codCorrect(codset, method = "half", offset = 0)
    codset = codNormalize(codset, method = "loess", weights = getWeight(codset), loess.method = "fast")
    exprs <- exprs(codset)  ## to get SignalIntensity
    snr  <- getSNR(codset)  ## to get SNR
    dat <- cbind(exprs,snr)
    codelink_processed[[length(codelink_processed)+1]] <- dat
    print(head(codelink_processed[[1]]),10)
  }
  return(codelink_processed)
}


     SignalIntensity   SNR
1  7.197392657      0.7381305998
2 12.403618142      13.7535937689
3  8.749735373      1.7720060283
4 11.373505481      6.7607981511
5 11.348655741      6.5203397924
6  9.734132935      2.2048101666

I got the above data when I tried to process the raw data, however the second column is missing. Can any body tell me, where I am going wrong. Did I miss anything?