I use GNUPLOT and PGPLOT for plotting my data in C/C++. But these are ridiculously slow when the data size becomes huge. So I want a plotting library that can give me a fast response even if I plot a million points on it. Any recommendations?
- It should be freeware.
- It would be good if it runs on all POSIX systems.
- It should run at least on CentOS and Ubuntu.