[R] "Levels" error after printing

[Gundala Viswanath]

Hi all,

After running this code:

__BEGIN__
dat <- read.table("gene_prob.txt", sep = "\t")
n <- length(dat$V1)
print(n)
print(dat$V1)
__END__

With this input in "gene_prob.txt"

__INPUT__
HFE 0.00107517988586552
NF1 0.000744355305599206
PML 0.000661649160532628
TCF3    0.000661649160532628
NF2 0.000578943015466049
GNAS    0.000578943015466049
GGA2    0.000578943015466049
.....

I get this print out.

......
[8541] LOC552889     GPR15         SLC2A11       GRIP2         SGEF
[8546] PIK3IP1       RPS27         AQP7
8548 Levels: 3.8-1 A2M A4GALT A4GNT AAAS AAK1 AAMP AANAT AARSD1 AASS
... hCG_1730474

What's the meaning of the last line? Is it an error?
How can I fix it?

-- 
Gundala Viswanath