NMRViewJ incorporates the powerful JFreeChart charting library. This library has been integrated so that charts can be displayed on the Tk/Swank canvas allowing you to combine charts with other graphical items. Any data you extract in NMRView, whether from datasets, peaks, structures or any where else, can be plotted with simple commands. This figure was made with two commands. The figure command creates a new toplevel figure window (you can have as many as you want) The plot command specifies the x and y values as well as some arguments to specify attributes like colors.