Me too. When you start handling huge amounts of data, Gnuplot starts to warm up where other tools break. It is fast as hell.

Gnuplot dies when fed hundreds of megabytes of data. At some point you have to start making your own tools. Here's an example:

http://kmkeen.com/rtl-power/tholin_rtlsdr.png

Every pixel is a datapoint. There are only 1.5M values in that render (3-tuples of time, frequency and intensity) but the resolution of that chart is pretty low. People casually do charts a hundred times larger. Then you start running into other problems, like sharing the images. Firefox won't display images wider/taller than 32k px for example.

Hey that's a really interesting chart! Do you mind if I post it on /r/dataisbeautiful ? Is there an accompanying article?

What tool is used for this?