I have series of measurement in several files. Every file is looking like this:

```
1 151.973938 144.745789 152.21991 17:57:14
2 151.995697 144.755737 152.21991 17:57:14
3 152.015747 144.765076 152.21991 17:57:14
.
.
.

```

I'm looking for a possibility to compute the average of the same field in several files. At the end of the process I would like to have a graph of the average measurement.

Is that possible with gnuplot? I wasn't able to find a fitting option in gnuplot by myself. If not, which different way to achieve that would you recommend?

Best regards, Juuro