Publisher review:Qalculate! is a multi-purpose desktop calculator for GNU/Linux. Qalculate! is a multi-purpose desktop calculator for GNU/Linux.
It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (KDE or GTK ).
Features:
- Calculation and parsing:
- Basic operations and operators: - * / ^ E () && || ! < > >=
- Fault-tolerant 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 database-like structure
- Plotting:
- Uses Gnuplot
- Can plot functions or data (matrices and vectors)
- Ability to save plot to PNG image, postscript, etc.
- Several customization options
Requirements: · CLN 1.1 - Class Library for Numbers · Libxml2 (>= 2.3.8) · Glib 2.x · Gnuplot 1.7 (optional, for plotting) · GNU Wget or gnome-vfs (optional, for retrieval of exchange rates, not needed if you use the KDE GUI)
Qalculate! 0.9.5 is a C/C++ script for Organizers scripts design by Niklas Knutsson.
It runs on following operating system: Linux / BSD.
Qalculate! is a multi-purpose desktop calculator for GNU/Linux.
Operating system:Linux / BSD
Qalculate! 0.9.5 script details 
