load and plot from multiple file

[rudra]

On Jul 10, 1:13 pm, Tim Harig <user... at ilthio.net> wrote:
> It would really help to see a representative sample of the data that you
> are working with and what you want the plot to look like.

The data looks something like that:
0.70711 -2.57266
1.00000 0.16694
1.22474 -0.15287
1.41421 0.28025
1.58114 -0.03806
1.73205 0.05049
1.87083 -0.01686
2.00000 -0.02918
2.12132 0.00246
2.12132 0.13460
2.23607 -0.01552
2.34521 -0.00033
2.44949 0.00550
2.54951 -0.00827
2.54951 -0.01189
2.73861 0.00397
2.82843 0.04685
2.91548 -0.00115
2.91548 -0.00951
3.00000 0.00069
3.00000 0.00214

and there are several such file.
I need two types of plotting:
1) multiple plot in same figure
2) grid of plots with different data in different grid