[R] Read

[Val]

HI all,
I am trying to read a csv file, but  have a problem in the row names.
After reading, the name of the first column is now "row.names" and
all other column names are shifted to the right. The value of the last
column become all NAs( as an extra column).

My sample data looks like as follow,
filename = dat.csv
The first row has a missing value at column 3 and 5. The last row has
a missing value at column 1 and  5
x1,x2,x3,x4,x5
12,13,,14,,
22,23,24,25,26
,33,34,34,
To read the file I used this

dsh<-read.csv(file="dat.csv",sep=",",row.names=NULL,fill=TRUE,header=TRUE,comment.char
= "", quote = "", stringsAsFactors = FALSE)

The output  from the above  is
dsh

 row.names x1 x2 x3 x4 x5
1        12 13 NA 14 NA  NA
2        22 23 24 25 26  NA
3             33 34 34 NA  NA

The name of teh frist column is row,banes and all values of last columns is NAs


However, the desired output should be
 x1 x2 x3 x4 x5
 12 13 NA 14 NA
 22 23 24 25 26
 NA 33 34 34 NA


How can I fix this?
Thank you in advance