Ngraph is the program creating scientific 2-dimensinal graphs for the researcher and engineer. Ngraph reads numerical data from a flexible text file, and plots it in the graph. Ngraph can create the graph sutable for presentations and for papers. Ngraph also assists data analysis.

Features of Ngraph:
1. Easy to use due to graphical user interface.
2. High operativity due to multi window interface.
3. Plot with broken lines, marks (90 kinds), curves (spline and B-spline interpolation), arrows, rectangles, error bars, bars, etc.
4. Fitting by n-th polynomial or user defined math functions.
5. Fitting with weight by any math function.
6. Data conversion by math expression.
7. File output of converted data.
8. Evaluation, mask, and movement of the plotted data.
9. Linear plot, semi-log plot, log-log plot.
10. Two or more graphs are created in a page.
11. Linkage of the axis scale in multi graph.
12. Appending the (saved) graph to the current graph.
13. Saving graph with data attached.
14. Zooming, trimming, undoing of the axis scale.
15. Grid is added to the axis.
16. Automatic setup of the axis scale.
17. Detailed setup of gauging and numbering for axis.
18. Legend by lines, curves, polygons, rectangles, ellipses, marks, texts.
19. High functional text legend such as a display of date, file name, contents of the data file, etc.
20. Automatic legend creation.
21. Legend by a parabola, gauss function, Lorentz function, and sin function.
22. Automatic legend creation of fitting results.
23. Fixed form processing by add-in scripts.
24. Automatic processing by scripts.
25. Export via clip board and meta file (Windows version).
26. Compact PostScript file creation (suitable for electrical submition).
27. Export via original simple graphics file.
28. Perfect data compatibility between Windows and Unix.

The license of this software is Freeware, you can free download and free use this graphing software.