Patch release information

Version 2.0f includes fixes for most reproducible bugs discovered to date. Most of the bugs fixed have been minor/obscure issues, many of which were also present in version 1.6 or were in the new features added in 2.0. To determine if you need a patch release, please consult the What's new list below or the fixed bug list.

Downloading the new version

Version 2.0f supports all 32-bit platforms: Windows 95/98/ME, NT 4, and Win 2000/XP/Vista.

What's new in version 2.0f

  1. Fixed infinite loop parsing comma operator in domains and 2-variable functions when decimal separator is also set to ",".
  2. Fixed crash graphing equations with free variables that have no on-screen solutions.
  3. Added independently-settable font for bottom labels.
  4. Graphs are now recalculated automatically upon changing the Theta Range.
  5. The fraction characters ¼, ½, and ¾ are now accepted in place of normal decimals (before they could cause an infinite loop in the equation parser).
  6. The custom increment for point table spacing now works for polar graphs as well as cartesian and parametric.
  7. Switched from WinHelp to HTML help format, which is supported on Vista.

What's new in version 2.0e

  1. Added 2 more free variables, j and k, to make it easier to parameterize complicated equations.
  2. Fixed crash graphing ODEs that had their highest differential raised to an even power, e.g. dy^2 = x.
  3. Added Heaviside step function: h(x) = 0, for x < 0, 1/2 for x = 0, 1 for x > 0
  4. Fixed bug which prevented the grid from being resized automatically when the equation editor or status bar font size was changed. Also fixed a slight miscalculation which caused the status bar to overlap the bottom of the graph window a bit under some circumstances.
  5. Fixed bug in version 2.0d that sometimes caused equations for derivatives to become garbled.
  6. Added floor() (synonym for int()) and ceiling() functions. Added support for |x| in place of abs(x).
  7. Added mod operator (or %, your choice) to support modulo division.
  8. Added support for 2-variable functions, including min and max.
  9. Fixed another inequality shading problem, this time with curves that are steep near a discontinuity, like y >= sqrt(5x-1)-2.
  10. Improved handling of point tables with small increments/large numbers of points. However, there is still a 1000-point limit.
  11. Fixed bug in 2.0d which prevented changing the name of a data plot.
  12. Tweaked curve-fitting algorithm to run for more iterations by default, so data sets with exact solutions don't end up with extra junk terms in them (e.g. y = 2x+2.1*10^-5).
  13. Added support for solving single-variable equations (and inequalities) with 2 solutions, e.g. x^2-x=6 or x > 6/x
  14. Added support for labels along the bottom of the grid (not just the top).
  15. Fixed bug which caused annotations to print at unreadably small size.
  16. Fixed bug in 2.0d which caused Copy Graphs (Color) to use default color scheme instead of alternate pre-defined color scheme.

What's new in version 2.0d

  1. Fixed bug that prevented changes to the state of the labels from taking effect immediately when changed via the dialog box.
  2. Fixed an infinte loop when graphing on base-10 log paper with the Point Tables on.
  3. Added Unicode support to allow for more East Asian language translations.
  4. Added a number of new checks to make sure you are reminded to save your work on closing a file after making changes other than adding/removing equations.
  5. Fixed implicit function graphing to not display incorrect graphs when given an equation with no solution.
  6. Fixed reload of strict inequalities so the redrawn curve has the same color and dashed pattern as when originally graphed.
  7. Improved detection of discontinuous functions like x=(-3)^y
  8. Fixed crash attempting to change fonts when no printer was installed.
  9. On Windows XP, the program automatically uses the new XP look-and-feel; you no longer need to copy the Graphmatica.exe.manifest file manually.

What's new in version 2.0c

  1. Mouse wheel support added to graph surface and grid control. On the graph surface, Shift+wheel scrolls left-right and Ctrl+wheel zooms in and out.
  2. Fixed bug that prevented you from specifying values for free variables when they were used in an equation only through a user-defined function.
  3. Fixed intermittent errors shading inequalities like "abs x - abs y > 3" and "x^2-y^2 < 6".
  4. Fixed an issue which caused parts of circles/ellipses to disappear when the horizontal axis through them was too close to the edge of the screen.
  5. Added option to shade the inverse of the solution for inequalities.
  6. Added Options button to Integrate Curve dialog box and fixed refresh of integral on screen when you change the integration options.

What's new in version 2.0b

  1. Fixed crash using AutoRange when ODE flow fields are on screen.
  2. Cleaned up documentation errata due to switch to tabbed dialog boxes (no View/Colors menu anymore, for instance)
  3. Added "power function" y = ax^b to equation types available for curve fit.
  4. Fixed crash on Paste Data Plot when the Data Plot Editor was not open.

What's new in version 2.0a

  1. Fixed handling of y = (1/a)^x {a: 1,3,1}. This graph was incorrectly being tagged as a discontinous function.
  2. Corrected references to the defunct Labels menu item in the help file.
  3. Added safeguard to prevent you from choosing colors that are the same as the background in the Colors dialog box.
  4. Fixed the Set Initial Value menu item for systems of ODEs and second- order and higher equations.
  5. Size of dots on dotted grid is now dependent on gridlinewidth parameter.
  6. Fixed crash loading data plot on startup.

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kSoft, Inc. ksoft@graphmatica.com Last updated: Sun 11 May 2008