Off topic:Convert scientific notation to float in R

Question

[sai]

I have large files with over 100 columns. I used read.table to read the files in R. Problems I have is that some values in a column are displayed in scientific notation such as 7.893e-06. When I "sort" these columns from large values to small values, the result is 7.893e-06 2.418e-05 2.373e-05 2.369e-05 0.998 . . .

How can I fix this problem? Thank you!