[R] data frame is killing me! help

[bbslover]

Usage 
data(gasoline) 
Format 
A data frame with 60 observations on the following 2 variables. 
octane 
a numeric vector. The octane number. 
NIR 
a matrix with 401 columns. The NIR spectrum

and I see the gasoline data to see below
NIR.1686 nm NIR.1688 nm NIR.1690 nm NIR.1692 nm NIR.1694 nm NIR.1696 nm
NIR.1698 nm NIR.1700 nm 
1 1.242645 1.250789 1.246626 1.250985 1.264189 1.244678 1.245913 1.221135 
2 1.189116 1.223242 1.253306 1.282889 1.215065 1.225211 1.227985 1.198851 
3 1.198287 1.237383 1.260979 1.276677 1.218871 1.223132 1.230321 1.208742 
4 1.201066 1.233299 1.262966 1.272709 1.211068 1.215044 1.232655 1.206696 
5 1.259616 1.273713 1.296524 1.299507 1.226448 1.230718 1.232864 1.202926 
6 1.24109 1.262138 1.288401 1.291118 1.229769 1.227615 1.22763 1.207576 
7 1.245143 1.265648 1.274731 1.292441 1.218317 1.218147 1.222273 1.200446 
8 1.222581 1.245782 1.26002 1.290305 1.221264 1.220265 1.227947 1.188174 
9 1.234969 1.251559 1.272416 1.287405 1.211995 1.213263 1.215883 1.196102

look at this NIR.1686 nm NIR.1688 nm NIR.1690 nm NIR.1692 nm NIR.1694 nm
NIR.1696 nm NIR.1698 nm NIR.1700 nm 

how can I add letters NIR to my variable, because my 600 independents never
have NIR as the prefix. however, it is needed to model the plsr.   for
example aa=plsr(y~NIR, data=data ,....), the prefix NIR is necessary, how
can I do with it?
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