R中的read.delim（）不读取.txt文件，保留变量的原始值

Question

Hi everybody I am trying to load a .txt file in R and I got some troubles trying to make this. My original .txt file has the next structure (I can't add dput version because the loading of my file is wrong but I include variables and their values):

ID  Key.Number

1708888894  4222200000549012
0208823891  0002200000549111
0508823891  1717100000549111
0999923891  1717100000549111
0708888894  0002200000591111

It has the name "Testing.txt" and is formed by 2 variables ID and Key.number . In the .txt file variables are separated by tabulation (tab). For reading my file I used this code:

test=read.delim("Testing.txt")
test

And I got this:

          ID   Key.Number
1 1708888894 4.222200e+15
2  208823891 2.200001e+12
3  508823891 1.717100e+15
4  999923891 1.717100e+15
5  708888894 2.200001e+12

How you can see for ID column zero was omited and for Key.Number all values are in scientific format. Also I have tried with read.table but due to the nature of source file (Testing is only an example) column names are included in the first row and when I use col.names()=test[1,] I don't get the original names. I got this with read.table()

          V1               V2
1         ID       Key.Number
2 1708888894 4222200000549012
3 0208823891 0002200000549111
4 0508823891 1717100000549111
5 0999923891 1717100000549111
6 0708888894 0002200000591111

Many thanks for your help and your advice It is important for me.

Answer 1

DF <- read.table(text="ID  Key.Number

1708888894  4222200000549012
0208823891  0002200000549111
0508823891  1717100000549111
0999923891  1717100000549111
0708888894  0002200000591111", 
colClasses="character", header=TRUE, blank.lines.skip=FALSE)


#           ID       Key.Number
# 1                            
# 2 1708888894 4222200000549012
# 3 0208823891 0002200000549111
# 4 0508823891 1717100000549111
# 5 0999923891 1717100000549111
# 6 0708888894 0002200000591111