DPlot 2.3.0.9

Major Features:

1. Multiple scaling types, including linear, logarithmic, and probability scales on the X and/or Y axes. DPlot also provides several special purpose scale types, including grain size distribution plots, tripartite grids (shock spectra), polar charts, triangle plots, N1.85 hydraulic scales, and Mercator projection.
2. Contour plots of 3D data, shown as contour lines in a plan view of the XY plane or as shaded bands in a 3D projection, optionally with light source shading. DPlot accepts both randomly-spaced 3D points and points on a rectangular grid. For rectangular grids only, DPlot can also produce a waterfall plot, a 3D bar chart, and a simple wireframe mesh.
3. Use a background image (BMP, GIF, JPG, PNG, or TIF) for your 2D plots:
4. Average Curve with Error Bars, error extents equal to the mean minus the extremes, the standard error, or the standard deviation.
5. Bar charts with a large number of presentation options
6. Box-and-whisker plots and dot graphs for one or more groups of 1D data
7. Easily create blank graph paper. Several examples are shown on the Graph Paper page.
8. Error bars with magnitudes set to a constant value, to a percentage of the amplitudes, or independently.
9. Bubble plots with symbol sizes proportional to a third dimension.
10. Bubble plot from an equation Bubble plot, recent earthquakes
11. Vector plots with vector lengths and colors proportional to a third dimension and angles from a fourth dimension.
12. Fill between 2 curves, fill the area formed by closing a curve, or fill from a curve to a specified Y value. Choose from seven pre-defined fill patterns or create a custom pattern.
13. Fill regions are also useful for solving inequalities and systems of inequalities.
14. 3D scatter plots, with up to 100 data sets and colors based on Z value or data set
15. The data for the wing was provided by tools created by SpreadsheetWorld. A nifty animation of the wing was created with Video Edit Magic from a sequence of bitmaps generated by DPlot.
16. Choose from 40 symbol styles and/or 7 line styles for your XY plots. You have full control over symbol size, line weight, and color. In addition to the 40 built-in graphic symbols you can use any character from any of the Wingdings fonts included with Windows
17. Choose from a variety of number formats for each axis. Date and time formats are customizable.
18. Replace or supplement the numbers appearing along each axis with custom labels.
19. Copy and/or link data from other sources (e.g. spreadsheets), or use  Excel Add-In to easily move data from Excel to DPlot.
20. Copy and/or link DPlot-produced graphics to other applications
21. Add text notations to plots
22. Least squares curve fitting allows you to fit a polynomial to your data.
23. The licensed version includes a more general curve fitting routine. See below for more information.
24. Data manipulation functions include integration, differentiation, Fast Fourier Transform, filtering, data smoothing, and many other simpler editing functions.
25. If you have several data records from the same high-speed event and want to play back those records in sync with each other... well, you can. Have a video associated with your data? Play the video back along with your data, synchronized at the data rate you specify. Click the picture below to see a reduced-resolution example of this feature in action. 
26. Interpolate between points, scan values of curves graphically, and report peak values.
27. Include subscripts, superscripts, and characters from the Symbol font (Greek characters, trademark symbols, etc.) in the title lines and axis labels of your plots
28. Plot very large data sets. For XY plots, the total number of data points is limited to about 268 million
29. Create commercial-quality blank graph paper. For examples and instructions see the Graph Paper page.
30. Send data to and control DPlot from another program through the free-of-charge DPLOTLIB interface (a separate download). Example programs with source for Visual Basic, VB.NET, PowerBasic, 4 different C compilers and 5 different FORTRAN compilers are provided.
31. You may create additional functionality with your own plugin modules for file import and data manipulation. Example C plugin source code is provided with the Plugin Examples.

Enhancements: 

• Bug fix: This one has been present for a while, unfortunately. On XY plots if you allowed DPlot to pick a tick mark interval (the default), then for large extents a bonehead test and rounding problem might have extended the extents by one interval over those specified when that was not necessary. For example if you specified extents of 0 to 2 million and the default tick mark interval was 100,000, usually the upper extent would be adjusted to 2.1 million. Thanks to Howard Katz of Anatek for pointing out the problem.
• Bug fix: Not much of a bug, but the last update included a MessageBox reporting the time required to run an FFT, which of course was meant for the use in updating the Help file topic and should have been removed.
• DPlot Jr no longer includes the "Buy DPlot" menu command on the main menu bar. Given how DPlot Jr is used by the majority, this feature wasn't appropriate. 

• Windows 7, 2008, Vista, XP, NT, ME, 2003, 2000, Windows 98, 95