SGhosh - 2018-10-01

Sir,
My *.dat file is shown below
Experiment Onset Current Density
1 -3.574 31
2 -3.652 14
3 -3.662 15
4 -3.665 15
5 -3.663 14
6 -3.645 11
7 -3.644 10
8 -3.63 10
9 -3.653 10
10 -3.644 10
11 -3.649 11
12 -3.639 28
13 -3.642 9
14 -3.627 31
15 -3.643 21
16 -3.636 35
17 -3.628 24
18 -3.63 43
19 -3.638 25

Now I wish to plot a grouped bar chart with the left y-axis from [-3.65:-3.55] (2nd column) and right y-axis from [0:40] (3rd column) against 1st column being the x-axis.
I initialized as
set style data histograms
set yrange [-3.65:-3.55]
set ytics nomirror
set y2range [0:40]
set y2tics

Can anybody help me with the rest of the code for plotting 1st column (x) vs. 2nd column (y) and 1st column vs. 3rd column (y2)

Thanks,