[R] Help with plot Grouped Bar Plot by using R

[R_beginner_starter]

Thanks a lot, Jim.

I get my desired output by using your R script at the end 
Yesterday was my mistake....

Apart from that, do you have any idea to plot a line graph/chart?
My Input file is shown as below:

Range	Data1	Data2
1	38	37
2	38	37
3	38	37
4	37	37
5	37	37
6	37	37
7	37	37
8	37	37
9	37	37
10	37	37
11	37	37
12	37	37
13	37	37
14	37	37
15	37	37
16	37	37
17	37	37
18	37	37
19	37	37
20	37	37
21	37	36
22	37	36
23	37	36
24	37	36
25	37	36
26	37	36
27	36	36
28	36	36
29	36	36
30	36	36
31	36	36
32	36	36
33	36	36
34	36	36
35	36	36
36	36	36
37	36	36
38	36	36
39	36	36
40	36	36

Thanks for your further notice and advice :)

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