[R] A problem on sink() and format,suggestions appreciated

[Yong Wang]

Dear R users
I get a weired problem when use sink:
since the data set pretty big, I sink intermediate result for further 
use,following
lines are consistently used when write data

###########################
sink("dataname.txt")
data
sink()
##########################

at first couples of run, all 10 variables are wrote to a file in following 
format:


 	V1  	   V2 	  .......  	V10
1	10457   132356.7  .......      4356.8
2       75690.2 66697     .......      98777
.	..................................
10000   654786  3412.54   ......       98712.567



then I did modifcations somewhere else, the format change to:

 	V1  	   V2 	  .......  	V9
1	10457   132356.7  .......      7823.569
2       75690.2 66697     .......      77024
.	..................................
10000   654786  3412.54   ......       336721

 	V10
1	4356.8
2       98777
.	.......
10000   98712.567

this format is not convenient to read.
can you hint me where the problem is and how can I make it back to the 
first format?
I worked on this hours but still can not figure out.

any suggestions highly appreciated!

thank you

yong