Version 1.6/3.6 Upgrade information

What's new in version 1.6/3.6:

1. Inequalities and integrals are displayed by creating and filling polygonal regions, rather than by enclosing a region and floodfilling it. This should eliminate the possibility of "leaks" due to inaccurate filling and make possible in the future features such as solving a system of inequalities.
2. Support for strict inequalities: '<' and '>' graph the curve as a dotted line following the convention. Use '<=' and '>=' for 'less than or equal' and 'greater than or equal', which graph a solid curve.
3. New calculus numerical integration features:
   • Rectangles above and below the curve are now supported as methods of integration in addition to the trapezoidal and Simpson's rules.
   • When integrating by rectangles or trapezoids, if you set the number of segments manually to a low enough number, individual segments will be drawn instead of a single shaded region.
   • When you start dragging on one curve and release over another, Graphmatica will find the area BETWEEN the two curves.
   • You can optionally type in the coordinates of the region to integrate over for better accuracy. In the integration options dialog box, select "Show Integrate curve dialog box" for the input method. If you select both this and "Select initial curve/region with mouse" then the Integrate curve dialog box will appear after you select the area to integrate over with the mouse, so you can fine-tune your selection.
4. By user request, the gridlines for trig graph paper now line up with the legends at multiples of pi.
5. New point-plotting support: equations of the form
   x=constant expression ; y = constant expression
   will graph a single point
6. New document model more like "standard" Windows applications - File/New creates a blank grid with the default settings. Open doesn't merge the .gr file you're loading with the current settings (unless you request it). Save doesn't prompt for a filename unless you haven't set one yet. (There is now a "Save As" if you want to save with a different name.) Finally, the name of the open file appears in the title bar.
7. Point evaluate and Integrate features show results in more decimal places.
8. Vastly improved point tables feature:
   For all types of graphs except polar, increment between calculated points varies as you zoom in and out (matches up with gridlines). You can also customize it to only calculate where legends are printed or at an interval you specify.
9. New critical point/root finder. Find Critical Points dialog box automatically finds zeros and critical points of Cartesian functions in the region on-screen. You can also enter a guess to find other zeros or critical points.

Windows specific features:

1. Icons in the graph paper dialog box are now all color, because NT refused to display the monochrome ones.
2. Scroll bars for the grid. Select "Show Scrollbars" from the Options menu to turn them on. Here's how they work: clicking on the arrow scrolls by 5% of the screen, a "page up" or "page down" click on the scrollbar scrolls by 25% of the grid, and dragging the thumb all the way to the end scrolls by 50% of the grid.
3. User-selectable fonts for all controls and labels on the grid. Choose Fonts from the View menu to select them. Set default fonts by choosing File...Save Setup afterwards.
4. Metafile output now includes text labels. Note however that they may overrun the allotted space since WMF does not support clipping regions.
5. Print tables can now display points for up to 4 Cartesian functions in the same table. You can customize how many using the new Tables Options menu item in the Options menu.
6. New print routines use common Print and Print Setup dialog boxes, and support color printing in both draft and proof quality! Also you can specify the margins, and documents with too many graphs to fit the list of equations on one page print correctly.
7. Most common Windows speed keys (e.g. Ctrl+P to print) are now recognized.
8. Axis labels other than x/y can now be specified. Also the default font for these labels is now italic, in keeping with convention.

32-bit specific features:

1. Long file names are supported. Also, the 32-bit version will be called Graphmatica.exe instead of GRAPHMAT.EXE.
2. The Hog CPU feature is not available since there is no way to disable multitasking in Windows95 or NT.
3. The 32-bit version creates Enhanced Metafiles (EMF) instead of Windows Metafiles when you use Copy Graphs. Unlike Windows metafiles, these will scale properly even when they include text.
4. Support for Windows 95 look-and-feel, e.g. sizing handle on status bar, non-gray 3-D color schemes, proper handling of system color changes while program is active, new toolbar with color pictures and tooltips instead of text buttons.
5. Clickable icons in dialog boxes.
6. New Copy graphs button on toolbar copies graphs using your favorite graphic format with a single click.