iMath Code

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iMath NEWS -- history of user-visible changes.  15. July 2017

Copyright (C) 2017 Jan Rheinlaender
See the end for copying conditions.

Please send iMath bug reports to jrheinlaender@users.sourceforge.net
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Version 2.2.1~rc5
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Version 2.2.0
  * Enable handling non-commutative functions (returning vectors or matrices)
  * Clear all symbols (do not persist) when a recompile happens where all formulas have been marked as changed
  * Rework units support
    * Allow composite preferred units
    * Split units.imath into several files: SI units, engineering units,
      imperial units and abbreviations for these three categories
    * Replace separate options for include files by a list of include files
  * Restructured global options menu and document options menu into serveral
    different menus
  * Prevent including the same referenced file more than once (important
    when working with master documents)
  * Fix bugs that occur when a master doc or a referenced file has a recalculation error
  * Fill the units drop-down menu in Format iFormula and Create iFormula dialogs with all units currently known to the compiler
  * Recognize TIMES U+00D7 and three different unicode dots as multiplication symbols
  * Allow defining unit prefixes with PREFIXDEF and automatically recognize
    combinations of prefix and unit as a new unit
  * Update code to build with GiNaC 1.7
  * Clean up code and make use of C++11 features
  * Add new simplification "ignore-units" which removes units from logarithms so that scientific formulas evaluate properly
  * Ensure that QUANTITY always reduces numbers to floating point values (which VAL does not necessarily do)
  * Allow inserting a complete file (with %%ii commands) as a single formula into a document
  * Implement syntax nospace{%DELTA T} to get a variable called ΔT
  * Improve substitution in products, e.g. subst(-2x, 2x = g) works now
  * Enable parser tracing with debug level 6
  * Improve symbolic integration by always extracting constant factors even
    if the integral itself cannot be solved
  * Allow substituting the integration variable in an integral, e.g. differential(x) = r differential(r)
  * Detect if a pure function contains a variable by investigating the definition of the function
  * Add missing integral for arccot
  * Fix bug that did not find manually created iFormulas in a forced recompile
  * Enhance simplification gather-sqrt to include roots in the denominator of fractions
  * Allow solving for general expressions, not just for symbols. E.g. solving for partial(x) works now
  * Fix issue with charts in global documents
  * Check for "spurious" complex part of the coefficient when printing (often happens when solving cubic equations)
  * Fix bug when evaluating integral with value zero
  * Parse the syntax FUNC FUNC (implicit multiplication of two pure functions)
  * Keyword DIFFERENTIATE now takes an arbitrary expression as the grade of differentiation
  * Fix problems with second-order and higher partial derivatives
  * DIFFERENTIATE now always create derivative objects, not fractions of differentials
  * Introduce new simplification "cancel-diff" to cancel differentials into derivative objects
  * Fix bug that created unnecessary options after using the Format iFormula dialog
  * Parse (and ignore) smath spacing commands ~ and `
  * Fix two printing bugs:
    - Library functions in combination with differentials
    - Printing with precision 1 produced things like 8 cdot 10^1
  * Add function interpol for linear interpolation to init.imath
  * Sort unit list in dialogs
  * Evaluating the integral int du/dt dt now automatically evaluates to u + C
  * Fix two bugs that crashed or froze the office
  * Rework symbolic integration and add a table of symbolic integrals
  * In the Edit iFormula dialog, clear the parameter field after pressing the Apply button
  * Print unit %gram as "g" instead of "gr"
  * Correctly center the difftype dot over a function with arguments
  * Automatically evaluate ln(e^x) to x
  * Formatting: Print (a + b + c)/x instead of 1/x (a + b + c)
  * Fix bug that did not recognize the selected chart object when inserting a new series
  * Fix bug that failed to read include files located on Windows network paths
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Version 2.1.4
  * Add option to suppress units when printing formulas
  * Added option to control evaluation of nth roots for negative bases to
    real values or principal branch values.
  * Integrated realroots option, inhibit underflow option and suppress units
    option into the dialogs and the documentation.
  * Allow multiple letters and digits in subscripts without curly braces
  * Enable implicit multiplications before and after formula labels
  * Enable unicode parsing of chart names, labels, etc.
  * Add function det() to calculate the determinant of a matrix
  * Add keyword TEXTFIELD to set variables from text fields
  * Fix bug that prevented a symbol from being changed to a vector or matrix
    after the first calculation run
  * Add keywords TABLECELL and SETTABLECELL to get and set the value of a
    cell in a writer table
  * Add keywords CALCCELL and SETCALCCELLS to get and set the value of a
    calc document cell range
  * Master documents: If the master document is already loaded, don't reload it
  * Complete rework of matrix handling
  * Put the debug output file into the user's temporary directory on Windows
  * Fixed bugs in connection with the factorial function
  * Fixed bug that did not recognize iFormulas after a copy-and-paste action
  * Fix problem with flickering charts in Windows
  * Extend QUO and REM to numeric arguments
  * Add AND, OR and NEG keywords (these are only interpreted within the
    first argument to the ifelse() function)
  * Ensure that a forced recalculation really does recalculate everything
  * Improve the Create_iFormula dialog
  * Show a field for compile error messages in the Create_iFormula dialog
  * Fix bug that did not allow using a unary minus on an equation
  * Allow iMath to distinguish between expression lists, e.g. x;y;z , and
    vectors, e.g. (x;y;z). Vector must be enclosed in brackets
  * Allow finishing the Edit iFormula dialog by pressing enter in the
    formula text window
  * Add keywords REALVARDEF and POSVARDEF to define symbols as real-valued
    and positive. This means that e.g. the conjugate() and abs() functions
    can be evaluated imm ediately
  * Add option showlabels that displays the equation label with the equation
  * Show a welcome screen before the recalculation
  * Changed behaviour of formula merge: Two formulas are always merged with
    automatic newline, and a formula followed by an expression with an
    automatic equal sign
  * Added function charpoly to calculate characteristic polynomial of a matrix
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Version 2.1.2
  * Fixed bug that did not recognize iFormulas after a copy-and-paste action
  * Fix problem with flickering charts in Windows
  * Fix bug that did not show or crashed the iMath options page under
  * Extras/Settings
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Version 2.1.1
  * Added square() to init.imath, fixing bug in substitutions.imath
  * Restructured menus to conform better with standard Office menu layout
  * Increase compilation speed by caching results of EQDEF statements
  * Increase update speed (after adding a formula)
  * Improved status indicator while scanning iFormulas
  * Add menu entry to show a list of all variables, their values and assignments defining them
  * Fill insert iFormula dialog with label of selected formula (if there is one)
  * Allow editing multi-line formulas
  * Improve conversion of decimal point to comma in some locales
  * Merged edit and modify dialogs into a single dialog
  * Fix bug in Create+Merge when creating a new formula from an existing one
  * Add macros to bring up dialogs. Macros can be assigned a keyboard shortcut by the user
  * Show error message in the dialog while editing an iFormula
  * Allow implicit multiplication before NROOT, QUO, REM, GCD and LCM
  * Allow finishing the Insert iFormula dialog by pressing <enter> in the formula text field
  * Improve copy+paste of iFormulas for locales other than English and German
  * Ensure that the deprecated user-defined properties are deleted from old documents
  * Allow converting an iFormula back to a normal formula by deleting all %%ii lines
  * Added master document URL to iMath document options dialog - this had been forgotten
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Version 2.1.0
  * Parse alignc, alignl, alignr formatting
  * Allow specifying multiple roots with nroot
  * Allow creating vectors like 1:20 or 1:19:2
  * Added some missing trigonometric functions to init.imath
  * Corrected inconsistent syntax of INTEGRATE with 4 parameters
  * Added documentation for PARTIAL
  * Removed forced auto-formatting of abs() because Office does it anyway
  * Removed forced auto-formatting of exp() because of feature request #12
  * Feature request #13: Automatic recalculation is now a setting in the Options menu
  * Fixed bug that crashed Office when accessing the iMath Option menu
  * Default precision in Extras-Options-Writer-iMath is now 4, as in the code
  * Implement scalar product of vectors
  * Compatibility changes for bison 3.0
  * Replaced OUString::valueOf() with OUString::number()
  * Fixed problems with integer option values in the registry
  * Show error message at duplicate equation labels
  * Enhance error reporting for parsing errors
  * Allow renumbering all equations in a document
  * Handle duplicate equation labels properly, especially on copy/paste
  * Remember user decision about renumbering duplicate equation labels
  * Fixed error in init.imath in function definition of exp()
  * Fixed bugs in chart creation and adding lines to charts
  * Allow finding the values of vectors and matrices
  * Enhance the differential() function to take a second argument, the grade of the differential 
  * Implemented ITERATE keyword
  * Fixed issues with accessing elements of vectors and matrices
  * Added missing scalar products for vectors and matrices
  * Removed | as a brace because Office itself doesn't parse it
  * Added missing [] brackets for functions
  * Try to improve performance by optimizing debug output
  * Add missing functionality to multiply to equations
  * Fix error in formatting of variables with attributes
  * Added keyword COLLECT
  * Removed user-defined property equation split point because it only makes sense on a per-formula basis
  * Fixed bug that made Precision a text property under user-defined properties
  * Fixed bug that sometimes crashed Office when iFormulas where deleted
  * Allow equations with operators other than =
  * Added PDIFFERENTIATE keyword
  * Avoid crash after an Undo action of a formula object
  * Fixed error message when reducing number of data points in a chart
  * Enabled functions re() and im() to get real and imaginary parts of numerics
  * Enhanced library of substitutions
  * Adjust decimal separator to Office Language Settings
  * Recognize the attributes bold, ital, font sans, font serif, font fixed
  * Enhanced design, icons by Vladislav Kosolapov
  * Added keywords QUO, REM, GCD and LCM for polynomial arithmetic
  * Inhibit CLN floating point underflow exception by default, may be turned on through a document property
  * Always calculate with Digits=17 (GiNaC default) instead of using the display precision defined by precision=...
  * Introduce nicer formatting for partial differentials with difftype 'line'
  * Suppress license display when installing from .deb package        
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Version 2.0.5
  * Updated reference documentation
  * Fixed bug that caused problems with variables being shadowed by
  * functions of the same name
  * Added explanation and functions for temperature unit conversions
  * Fixed bug that crashed iMath when RHS is a func
  * Prevent error message when creating function without a definition
  * Fixed bug that crashed iMath on diagram creation
  * Force autoformat of functions that cannot keep user format (currently
  * diff and exp)
  * FUNCDEF: Print function arguments if the user has defined some
  * Added keywords DIFFERENTIATE and INTEGRATE
  * Allow integrals without bounds
  * Allow integrals with a functions as the integration variable
  * Allow differentials as separate objects
  * Fixed bug that didn't print degrees celsius properly
  * Fixed bug in units.imath in definition of kJ
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Version 2.0.4
  * Updated examples files
  * Fixed two bugs because in iMathDoc.cxx
  * Removed component.uno.map from Makefile because of build error
  * Fixed crash because of missing symbol
  * Some cosmetic fixes
  * Fixed bug that did not show drop-down menu of simplifications
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Version 2.0.3
  * Fixed bug in EQC that confused ln and log
  * Allow for using keywords left and right with brackets of functions
  * Recognize newlines between formulas when merging
  * Fixed bug that did not print the '%' sign as a unit
  * Fixed bug that prevented producing and managing charts with iMath
  * Add series description to CHART command to work around a bug in LO which
  * forgets the series descriptions when saving the file
  * Changed XEvent... to XDocumentEvent... since it has been deprecated
  * Moved imathprint code to EQC library and fixed some bugs in it
  * Fixed bug in the Edit-Clear menu command
  * Removed all throw() specifications from function definitions
  * Improved hide/show of formulas
  * Fixed bug that incorrectly printed aligned formulas with hidden lines
  * Fixed bug in format dialog that didn't correctly insert the existing units
  * Fixed buggy show/hide of equations
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Version 2.0.2
  * Rebuild with libeqc-1.4.8 bugfix
  * Fix problems in debian/* config files
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Version 2.0.1
  * Added string expression type
  * Added "exponent" option to set a fixed exponent for printing floats
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Version 2.0.0
  * Reworked internal structure completely
  * Improved error handling
  * Changed equation label syntax from #...# to @...@ because of clash with
  * vector and matrix syntax. Documents will be upgraded automatically
  * Added vector and matrix with STACK and MATRIX keywords
  * Some minor bug fixes
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Version 1.1.1
  * Rebuilt for libreoffice 3.4
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Version 1.1.0
  * Bug fixes
  * Improved automatic formatting a lot
  * First mature release IMHO
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Version 1.0.3
  * Bug fixes
  * Option autoformat
  * Support for charts
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Version 1.0.2
  * Windows beta release
  * Handling of master documents
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Version 1.0.1
  * Fixes to compile for windows
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Version 1.0.0
  * First production release
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Version 0.3.0
  * Further development
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Version 0.2.0
  * Further development
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Version 0.1.0
  * First release
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----------------------------------------------------------------------
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