Qalculate

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Package information

Qalculate is a multi-purpose cross-platform desktop calculator that features a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface.

Installation

USE flags

USE flags for sci-libs/libqalculate A modern multi-purpose calculator library

+hardened	Disable unsafe functions like 'command' and variables like 'uptime'.
curl	Add support for client-side URL transfer library
gnuplot	Enable support for gnuplot (data and function plotting)
icu	Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu
readline	Enable support for libreadline, a GNU line-editing library that almost everyone wants
test	Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)

Data provided by the Gentoo Package Database · Last update: 2024-10-15 06:19 More information about USE flags

Emerge

root #emerge --ask sci-libs/libqalculate

GUI applications

Qalculate-gtk

root #emerge --ask sci-calculators/qalculate-gtk

Qalculate-qt

root #emerge --ask sci-calculators/qalculate-qt

Usage

Basic calculations

To perform basic calculations with qalculate, use it like a regular calculator:

user $qalc 1 + 1

1 + 1 = 2

Interactive mode

To enter qalculate's interactive mode, run qalc:

user $qalc

>

And start performing calculations:

user $qalc

> 1 + 1

  1 + 1 = 2

>

Using the previous result

To use the previous result in a new calculation, use the ans keyword:

user $qalc

> 1 + 1

  1 + 1 = 2

> ans + 2

  ans + 2 = 4

>

Performing currency conversions

Add curl to sci-libs/libqalculate's USE flags:

FILE /etc/portage/package.use/libqalculate

sci-libs/libqalculate curl

To convert between currencies:

user $qalc

> 1 usd to aud

  1 USD ≈ AUD 1.519918094

See also

* bc — arbitrary-precision fixed-point mathematical scripting language