galculator
==========
a GTK 2 based scientific calculator
For installation information see the INSTALL file.
For a list of shortcuts, see doc/shortcuts
There is a short man page (man galculator)
Information on Formula Entry mode can be found below.
In general, galculator's homepage galculator.sf.net is the most reliable
and up2date source of information.
RPMs: a spec file is included (galculator.spec). Thanks to Victor. Or
download at http://dag.wieers.com/packages/galculator/ (thanks to Dag Wieers)
DEBs: galculator is in DEBIAN/unstable. Thanks to seb128.
Formula Entry Mode
==================
Since version 1.2.0 galculator features a formula entry mode. This mode is one
more step towards a calculator accepting input as written on the paper.
galculator's formula entry mode aims to provide all the features of the
algebraic mode (and even to go beyond ...).
This part of galculator is developed actively. This section gives an overview
of the functions currently implemented and points out some restrictions.
Formula entry mode accepts decimal numbers as input as well as hexadecimal,
binary and octal numbers. The latter three have to be entered with a prefix:
Number base Prefix(es) Example
decimal none -3.1415
hexadecimal 0x or 0h 0xAF
binary 0b 0b1001
octal 0o 0o777
All algebraic operations and functions of the algebraic mode are supported. The
following table lists all available operations:
Operation identifier
+, -, *, / +, -, *, /
percent x%y (x percent of y) %
power x^y ^
module (MOD) mod, MOD
left shift (LSH) <<
right shift (INV + LSH) >>
AND &, and, AND
OR |, or, OR
XOR xor, XOR
Let's speak of factorial and complement as functions. Most functions' argument
has to be enclosed by brackets. Therefore sin 3 is not allowed and has to be
written as sin(3). User defined functions can be used in formula entry mode
without any restrictions!
Function Function identifier Example
Trigonometric functions:
Sine, Cosine, Tangent sin, cos, tan sin(0.5)
their inverse asin, acos, atan asin(0.5)
their hyperbolic variants sinh, cosh, tanh sinh(0.5)
and the inverse of those asinh, acosh, atanh asinh(0.5)
natural logarithm (base e) ln ln(3)
logarithm (base 10) log log(3)
square root sqrt sqrt(3)
factorial ! (3)!, 3! brackets are
optional
complement ~ ~(3) brackets are
mandatory
If formula entry mode's parser encounters an (syntax) error, the formula entry
text is turned red.
User defined functions
======================
Since version 1.2.1 galculator also features user defined functions. They can
be called with the fun button next to the constant button and work like the
other function buttons like sin, cos, etc. (except that inverse and hyperbolic
are not supported). User functions can be defined in the Preferences dialog
(Functions page). The function name can be any string beginning with a letter.
So far, only a single variable is allowed. Expression gives the string
expression of the function with respect to the specified variable:
Function Name Variable Expression
f(x)=1-x f x 1-x
User defined functions can depend on other user functions:
Function Name Variable Expression
g(x)=1/(1-x)=1/f(x) g x 1/f(x)
User functions can also be called from formula entry mode.
Shortcuts
=========
doc/shortcuts
http://galculator.sf.net
simon floery (chimaira@users.sf.net)
