I am working on a graphing project in New Zealand for internet data.
I like the graph you have made here and need to make a similar yet more basic version.

I think we need a 2d graph that will graph a server against time and latency. So 3 variables.
* time
* server
* response time (latency)

It will be similar to the graph here: http://gnuplot.sourceforge.net/demo_4.3/heatmaps.html
Except there will be a lot more data points and the x-axis will be time, y-axis the server name and the color will be based on the latency.

I am currently using gnuplot to try achieve this but am having problems.

Any chance you could have a look at my data and suggest a way of doing it?

The data is in this format:
ns3b.int.dns.net.nz 1254355290000 4
ns3b.int.dns.net.nz 1254355890000 5
ns3b.int.dns.net.nz 1254356190000 1
ns3b.int.dns.net.nz 1254356490000 1

ns4a.int.dns.net.nz 1254355230000 1
ns4a.int.dns.net.nz 1254355530000 6
ns4a.int.dns.net.nz 1254355830000 1
ns4a.int.dns.net.nz 1254356130000 25

Where the 2nd column is the unix time in milliseconds.
There is A LOT of data this is just a snippet.

Any help would be much appreciated!

Cheers.