The ygraph tool graphs one-dimensional data or displays a time-series of one-dimensional data sets. it is an enhanced alternative to the xgraph utility and supports the same input format as xgraph. additionally, ygraph features:

* animating multiple plots simultaneously and synchronously;
* stepping back and forth through animations one frame at a time;
* zooming, similar to xgraph but without opening a lot of new windows;
* plotting derivatives;
* subtracting plots;
* convergence tests;
* reading compressed files;
* exporting images and animations.