
Qalculate! features
Math Library
 Calculation and parsing:
 Basic operations and operators: +  * / ^ E () &&  ! < > >= <= != ~ &  << >>
 Faulttolerant parsing of strings: log 5 / 2 .5 (3) + (2( 3 +5 = ln(5) / (2.5 * 3) + 2 * (3 + 5)
 Expressions may contain any combination of numbers, functions, units, variables, vectors and matrices
 Supports complex and infinite numbers
 Supports all number bases from 2 to 36, time format and roman numerals
 Ability to disable functions, variables, units or unknown variables for less confusion: ex. when you do not want (a+b)^2 to mean (are+barn)^2 but ("a"+"b")^2
 Controllable implicit multiplication
 Matrices and vectors, and related operations (determinants etc.)
 Verbose error messages
 Arbitrary precision
 RPN mode
 Result display:
 Supports all number bases from 2 to 36, plus sexagesimal numbers, time format and roman numerals
 Many customization options: precision, max/min decimals, multiplication sign, etc.
 Exact or approximate
 Fractions: 4 / 6 * 2 = 1.333... = 4/3 = 1 + 1/3
 Symbolic calculation:
 Ex. (x + y)^2 = x^2 + 2xy + y^2; 4 "apples" + 3 "oranges"
 Factorization and simplification
 Differentiation and integration
 Can solve most equations and inequalities
 Customizable assumptions give different results (ex. ln(2x) = ln(2) + ln(x) if x is assumed positive)
 Functions:
 All the usual functions: sine, log, etc... : ln 5 = 1.609; sqrt(tan(20)  5) = sqrt(2.76283905578)
 Lots of statistical, financial, geometrical, and more functions (approx. 200)
 If..then..else function, optional arguments and more features for flexible function creation
 Can easily be created, edit and saved to a standard XML file
 Units:
 Supports all SI units and prefixes (including binary), as well as imperial and other unit systems
 Automatic conversion: ft + yd + m = 2.2192 m
 Implicit conversion: 5m/s to mi/h = 11.18 miles/hour
 Smart conversion: can automatically convert 5 kg*m/s^2 to 5 newton
 Currency conversion with retrieval of daily exchange rates
 Different name forms: abbreviation, singular, plural (m, meter, meters)
 Can easily be created, edit and saved to a standard XML file
 Variables and constants:
 Basic constants: pi, e
 Lots of physical constants and elements
 CSV file import and export
 Can easily be created, edit and saved to a standard XML file
 Flexible, can contain simple numbers, units or whole expressions
 Data sets with objects and associated properties in databaselike structure
 Plotting:
 Uses Gnuplot
 Can plot functions or data (matrices and vectors)
 Ability to save plot to PNG image, postscript, etc.
 Several customization options
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User Interface
 Graphical user interfaces implemented using KDE or GTK+2.0 and Glade XML
 Flexible expression entry and separate result display
 Displays whether result is precise or not
 Small and ... not so small mode
 Practical menus give fast access to all advanced features
 Calculation history
 Optional traditional calculator buttons
 Dialogs for management of and easy access to functions, variables and units (with quick conversion)
 User friendly dialogs for functions, with description and entries for arguments
 Create/edit functions, variables and units
 Easy editing of matrices and vectors
 Easy interface to gnuplot
 Separate window for fast conversion between number bases
 Periodic table
 Small separate utilities for base, currency and unit conversion
 Additional text based interface with full functionality
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