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Qalculate! (GTK+) Manual v0.9.2

Niklas Knutsson

This manual describes version 0.9.2 of Qalculate! (GTK+).

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To report a bug or make a suggestion regarding the Qalculate! application or this manual go to the bug submission form or the Qalculate! forums.


Table of Contents

Introduction
User Interface
Main Window
Expression Entry
Result Display
Keypad
Calculation History
Menu Bar
Variable/Function/Unit Managers
Convert Number Bases Dialog
Expressions
Objects
Operators
Calculator Modes
Variables
Variable creation/editing
Vectors and Matrices
Functions
Available Functions
Function creation/editing
Units
Currency
Conversion
Unit creation/editing
Plotting
A. Function List
Algebra
Analysis
Calculus
Combinatorics
Data Sets
Date & Time
Economics
Finance
Microeconomics
Exponents & Logarithms
Geometry
Circle
Cone
Cube
Cylinder
Parallelogram
Prism
Pyramid
Rectangle
Sphere
Square
Trapezoid
Triangle
Logical
Matrices & Vectors
Miscellaneous
Number Theory
Arithmetics
Integers
Number Bases
Polynomials
Rounding
Statistics
Descriptive Statistics
Distribution
Means
Moments
Regression
Statistical Tests
Trigonometry
Utilities
B. Variable List
Basic Constants
Large Numbers
Physical Constants
Atomic and Nuclear Constants
Electromagnetic Constants
Physico-Chemical Constants
Universal Constants
Small Numbers
Special Numbers
Temporary
Unknowns
C. Unit List
Angle
Angular Acceleration
Angular Velocity
Plane Angle
Solid Angle
Area
Currency
Electricity
Capacitance
Current Density
Electric Charge
Electric Charge Density
Electric Conductance
Electric Current
Electric Field Strength
Electric Flux Density
Electric Potential
Electric Resistance
Inductance
Permeability
Permittivity
Energy
Energy Density
Entropy
Molar Energy
Molar Entropy
Power
Specific Energy
Specific Entropy
Thermal Conductivity
Force
Dynamic Viscosity
Kinematic Viscosity
Moment of Force
Pressure
Surface Tension
Information
Length
Light
Illuminance
Irradiance
Luminance
Luminous Flux
Luminous Intensity
Radiance
Radiant Intensity
Magnetism
Magnetic Field Strength
Magnetic Flux
Magnetic Flux Density
Wave Number
Mass
Density
Mass Fraction
Radioactivity
Absorbed Dose
Absorbed Dose Rate
Dose Equivalent
Exposure
Ratio
Speed
Acceleration
Substance
Catalytic Activity
Catalytic Concentration
Substance Concentration
Temperature
Time
Frequency
Volume
Cooking
Fuel Economy
Imperial Capacity
Specific Volume
U.S. Capacity

Introduction

Qalculate! is not your regular software replication of the cheapest available calculator. Qalculate! aims to make full use of the superior interface, power and flexibility of modern computers.

The center of attention in Qalculate! is the expression entry, Instead of entering each number in a mathematical expression separately, you can directly write the whole expression and later modify it. Just enter an expression as you would write it on paper, press Enter and voila!

The interpretation of expressions is flexible and fault tolerant, and if you nevertheless do something wrong, Qalculate! will tell you so. Not fully solvable expressions are however not errors. Qalculate! will simplify as far as it can and answer with an expression.

In addition to numbers and arithmetic operators, an expression may contain any combination of variables, units, and functions. These are immediately accessible from the user interface — the menu bar, the managers, the calculator keypad, and automatic completion.

Qalculate! also has some special tools to increase your efficiency, including a number base conversion dialog and a simple plotting interface.

Although use of Qalculate! for simple calculations should be natural and self-explanatory, reading the rest of the manual can help you maximize your productivity and discover some maybe unexpected features. More advanced users should read on and discover a large number of customization options and the ability to create and modify your own variables, functions and units directly from the user interface.