Revision history

Version 4.3 (August 26th 2007)

Labels can now be rotated freely.
Graph can now calculate the area under a parametric function.
Zoom|Square will now keep the y-axis scaled equal to the x-axis until explicitly disabled.
Checkboxes added to the function list to indicate visibility.
You can now specify the exact placement of text labels.
a^(b/c) is now handled as a special case and will be plotted correctly.
The settings in the Animate dialog is now stored in the grf file.
Equations and inequalities are now plotted faster, especially when printed.
Fixed problem with animations that includes inequalities.
Fixed bug crashing Graph when trying to differentiate a recursive function.
Fixed bug in drawing shadings between functions.
Several minor bugs have been fixed.
Fixed and improved several things in the animation dialog.
Fixed problem where Graph might stop responding when trying to find an extremum.
Serbian, Croatian and Vietnamese translations added.

Version 4.2 (December 17th 2006)

You can now create animations that show what happens when a constant changes.
You can now choose default settings for save as image options.
The character map now has full Unicode support under Windows 2000/XP.
Text labels may now be rotated vertical from the context menu under Windows 2000/XP.
You can now specify an interception with the y-axis for the built-in trendlines.
Chinese (traditional), Mongolian, Swedish, Polish and Czech translations added.
Added option to scale the user interface.
The Euler beta function has been renamed from B to Beta to make B available as a custom constant.
Added support for expressions in text labels.
It is now possible to select several files at the same time when importing point series.
You can now hide some columns in the Calc|Table dialog.
The Draw type in the Insert function dialog now has three types: Automatic, Dots and Lines
Fixed bug in creating wrong trendlines when calculating in degrees.
Fixed bug with moving average disappearing when edited.
Several bugs related to Graph as OLE server have been fixed.
Fixed bug in mod function.
Several minor bugs have been fixed.

Version 4.1 (December 30th 2005)

Several minor improvements have been implemented.
When moved near a corner, the legend will now snap to the corner and stay there.
When moved near the arrows on the axes, the label will snap to the axis and stay there.
Added support for exporting images as Portable Document Format (PDF).
Plotting of piecewise functions has been improved.
Graph will now show the sum of squares in the description when creating trendlines.
You can now choose the width of the border around an inequality and it can even be set to 0.
Added character map to text label dialog to make it easier to insert special symbols in labels.
Implemented support for constructs like “sin(x) < y < cos(x)” for use in relations.
Dutch, Greek and Finnish translations added.
Several minor improvements made.
Fixed bug crashing Graph when copying an image with a shade betwseen two functions.
In logarithmic trendlines the two values in the result have always been switched. This error is now fixed.
Fixed bug in finding extremum points for trigonometric functions using degrees.
A lot of minor bugs have been fixed.

Version 4.0.1 (October 30th 2005)

A dialog is no longer shown when Explorer tries to get a thumbnail of a grf-file that was not created by Graph.
Calculate with complex numbers has been moved to the Edit|Axes dialog.
Some improvements in printing of grids and labels.
A few minor bugs have been fixed.

Version 4.0 (October 15th 2005)

Support for inequality added.
Functions, labels, etc. are no longer grouped in the list.
Graph elements are now drawn in the order they are shown in the list.
Graph elements can now be shown behind the axes.
As an alternative to transparent, labels may now have a custom background color.
New functions added: zeta, dnorm.
Graph now remembers expressions used in point series.
Graph now has a shell extension that shows thumbnails of grf-files in Explorer.
Now user defined variables and functions are supported.
The legend may now be moved freely with the mouse.
Text labels may now be attached to the end of the axes as alternatives to the axes labels.
Added support for saving images as JPEG files.
Added support for half cosine interpolation for smooth lines in point series.
You can now specify the resolution when saving as an image file.
Russian translation added.
Hungarian translation added.
Slovenian translation of help file added.
Fixed problem with inaccurate high order polynomial trendlines.
Fixed wrong area calculated for tangents.

Version 3.3.1 (February 27th 2005)

French translation added (including a French help file).
Fixed bug terminating Graph when some invalid functions are entered.
Several minor bugs have been fixed.

Version 3.3 (December 29th 2004)

Implemented the possibility to show end points at the ends of functions.
Arrows can now be used as markers on point series.
The legend can now be placed in all four corners of the window.
Error bars may now be added to points in point series.
Functions may now optionally be drawn as dots instead of lines.
Some minor improvements.
A lot of minor bugs have been fixed.
Bug deleting custom trendline models when quitting has been fixed.
Thorough correction in the German help file.
Problem importing large CSV files fixed.
Fixed several problems with the ability to find extremum points and crossings with the axes.
Slovenian language translation added.

Version 3.2.2 (Septmeber 12th 2004)

Fixed bug preventing Edit|Copy image from working for users with limited accounts.
Fixed bug crashing Graph when trying to open a non existing file.
A few minor bugs have been fixed.

Version 3.2.1 (August 31st 2004)

Fixed bug in creating moving average.
Fixed bug preventing user defined trendlines from working.

Version 3.2 (August 16th 2004)

Points may be added to series by clicking on the coordinate system while the Ctrl key is held down.
Calc|Evaluate can now be used to find extremum points and intersections with other functions and the axes.
A preview has been added to the open dialog.
Moving average can now be added as a trendline.
New functions added: Euler's beta function, Lambert's W-function (omega function)
Some minor improvements have been implemented.
The printing dialog has been improved.
Minor bug with printing Graph objects from Word fixed.
Fixed bug preventing the functions csc, sec, cot, acsc, asec and acot from calculating in degrees.
Spanish, Portuguese and Italian language translations added.

Version 3.1 (March 31st 2004)

OLE server implemented.
You can now use the Shift key instead of Zoom|Move system
New function: Gamma
Some minor improvements have been implemented.
Missing cursor for Zoom|Move system fixed.
A lot of minor bugs have been fixed.

Version 3.0 (January 20th 2004)

Text labels may now be added anywhere in the coordinate system.
Labels may contain any kind of OLE objects, for example images.
New functions added: exp, sec, csc, cot, asec, acsc, acot, sech, csch, coth, asech, acsch, acoth
Numbers on the axes may now be shown as fractions of pi.
Added Tip of the day.
Custom trendlines may now be created.
German language translation added.
Parameter and polar functions may now be differentiated.
The program can now check if a new version is available at startup.
A lot of minor improvements have been implemented.
Some minor bugs have been fixed.
Fixed bug in sum function.
A lot of bugs in calculations with degrees have been fixed.
It is now possible to print using bitmaps, which should work around some printer problems.

Version 2.7.1 (September 19th 2003)

The results in area calculations with polar functions are now correct.
The results in length of path calculations with polar functions are now correct
Fixed bug preventing the program from running as another user than the one who installed it.
Some minor bugs have been fixed.
A few very minor improvements have been made.

Version 2.7 (September 6th 2003)

Some minor bugs have been fixed.
Some minor improvements have been made.
You can now show coordinate labels at the points in the point series.
Calculate area and curve length are now shown in the same dialog as evaluate
Calculations of area and curve length are now done using Simpson's formula.
You can now use the mouse to mark the range to calculate area or path length.
Legend descriptions for functions, tangents and shades may now be customized.
You can now choose which elements shall be shown in the legend.
You can now insert a normal just like a tangent.
You can now use (), [] and {} as parentheses, example (sin[x])^2
Graph files may be imported into another coordinate system.
Data files with several point series may now be imported.
New functions added: logb, root
Now remembers last style, color and size when inserting functions and point series.

Version 2.6 (June 14th 2003)

Some minor bugs have been fixed.
It is now possible to zoom to fit the selected function or point series.
It is now possible to zoom to scale the axes equally, which make a circle look correct.
A legend can now be shown with an overview of the visible functions and point series.
A title with user selected font may now be shown above the coordinate system.
The axes can now be chosen to always be shown at the left and bottom of the image.
You can now choose to save the axes settings as default settings.
The grid color and background color may now be changed.
The label font and number font may now be changed.
The grid units can now be specified independent of the tick units.
The program can now auto select the tick units.

Version 2.5 (March 26th 2003)

A lot of minor bugs have been fixed.
Bug in differentiation fixed.
Added new functions: rand, integrate, sum
You can now choose if a function, tangent, shade or point series shall be visible.
Standard and parameter functions can now be shown at the same time.
You can now add polar functions.
When grids are enabled, logarithmic axes are now shown as logarithmic paper.
Fixed bug making parser case sensitive.
The evaluate dialog can now be docked (default) or undocked as a window.
Functions that end suddenly after a large slope are now drawn more correctly.

Version 2.4 (January 1st 2003)

Some minor bugs have been fixed.
These functions may now be used: mod, trunc, fract, ceil, floor, round, min, max, if, range
New operators added: and, or, xor, not, <, >, =
Some parentheses are no longer needed. You may for example write: f(x)=x^-1
Spaces are now allowed. For example: f(x)=x + 2
The toolbar has been changed, new buttons added, and it may now be customized.
Evaluation table is now available for parameter functions.
Data for point series may be imported from files.
The coordinate system may now be moved with the mouse.
The Calc|Table dialog is now shown correctly when large fonts are used.
Added feature to zoom as much as all points are visible.

Version 2.3.1 (October 26th 2002)

Bug in differentiation of division fixed.

Version 2.3 (October 7th 2002)

A redo menu item has been implemented
It is now possible to save as Portable Network Graphics (png).
A lot of minor bugs have been fixed.
Some minor improvements have been made.

Version 2.2 (August 27th 2002)

The internal functions for parsing and calculating have been optimized.
Some minor improvements made.
Some minor bugs have been fixed.

Version 2.1.1 (August 10th 2002)

Now it is possible to save bitmap files again.
Fixed lock up when adding one or two points with a smooth line.
Some printer bugs have been fixed.

Version 2.1 (August 4th 2002)

Added a menu item to check if a new version is available.
It is now possible to evaluate tangents.
Some small improvements.

Version 2.0 (July 18th 2002)

Bug in undo function fixed.
It is now possible to add series of points with different colors, styles, and more.
It is possible to generate different kinds of trendlines from a point series.
You may now add shadings to the functions.
Some minor bugs have been fixed.

Version 1.2.1 (January 1st 2002)

Bug, which might prevent writing ^ for power functions, has been fixed.
Some minor bugs have been fixed.

Version 1.2 (December 7th 2001)

Some minor bugs fixed.
Copy and paste of functions now implemented.
While calculating on areas, the area is now marked.
It is now possible to show a table with evaluated values.

Version 1.1.1 (September 23rd 2001)

Bug, that might crash program while printing, fixed.
Some minor bugs have been fixed.

Version 1.1 (September 1st 2001)

Interface changed: A list with functions and tangents is now shown in the main window instead of in each dialog box.
Different line styles are now supported: Solid, dot, dash, dash-dot, and dash-dot-dot.
It is now possible to trace a graph with the mouse.
It is now possible to use the mouse wheel to zoom in and out.
An undo feature has been added.
Problem related to bug in some printer drivers fixed.
A lot of minor bugs have been removed.
Some optimizations have been done.

Version 1.0 (March 6th 2001)

First release with many features.