Table of Contents
mathomatic - a computer algebra system
rmath - a computer algebra system with functions
mathomatic [ -bcehqrtuvwx
] [ -s level ] [ -m number ] [ input_files or input ]
rmath [ input_files ]
Mathomatic is a general-purpose computer
algebra system (CAS) that can symbolically solve, simplify, combine, and
compare algebraic equations, perform complex number and polynomial arithmetic,
etc. It does some calculus and handles all elementary algebra, except logarithms.
Plotting expressions with Gnuplot is also supported.
mathomatic is the
main Mathomatic application that does interactive symbolic-numeric mathematics
through a command-line interface. The numeric arithmetic is double precision
floating point with about 14 decimal digits accuracy. Many results will
be exact, because multiple floating point numbers can be combined for a
single mathematical value; for example: 2^(1/3), which is the cubed root
of 2 exactly.
rmath is a shell script that allows you to use Mathomatic
with input of functions like sin(x) and sqrt(x) automatically expanded
to equivalent algebraic expressions by the m4 macro processor. The elapsed
time, the CPU time, and the system time of the Mathomatic process are displayed
in seconds upon exit.
- -b
- Enable bold colors. Color mode will be turned
on and colors will be brighter if this option is specified. Same as the
"set bold color" command.
- -c
- Toggle color mode. This mode outputs ANSI terminal
escape sequences to make each level of parentheses a different color, for
easier reading. Requires a terminal emulator that supports ANSI color escape
sequences. If the colors are too hard to see, use the -b option to increase
the brightness.
- -e
- Process mathematical expressions and Mathomatic commands
instead of input files on the shell command line. Unquoted space characters
are the line separators on the Mathomatic input that follows this option.
Works similar to entering it into the Mathomatic main prompt, except the
autosolve and autoselect options are turned off. Useful for quick command
line calculations.
- -h
- Display a brief help message listing all of these
options and then exit.
- -m number
- Change the memory size of equation spaces.
It is followed by a decimal floating point number which is a multiplier
of the default equation space size. This allows larger equation spaces so
that manipulating extremely large expressions will succeed without getting
the "Expression too large" error. Specifying a number higher than 100 may
make Mathomatic unresponsive.
- -q
- Set quiet mode. The startup message and
prompts are not displayed. This is useful when piping or redirecting input
into Mathomatic, because the input won’t be displayed, so prompt output
should be turned off. This option does the same thing as the "set no prompt"
command.
- -r
- Disable readline input processing. Readline allows using the
cursor keys and outputs terminal control codes which can be turned off
with this option.
- -s level
- Set the enforced security level for the Mathomatic
session. Level 0 is the default with no security. Level 1 disallows shelling
out. Level 2 disallows shelling out and writing files. Level 3 disallows
shelling out and reading/writing files for complete security. This run-time
option was created for use on open public servers that can’t use the SECURE
compile-time define.
- -t
- Set test mode. Used when testing and comparing output.
Bypasses loading startup file, turns off color mode and readline, sets
wide output mode, ignores pause command, etc.
- -u
- Guarantee that standard
output and standard error output are unbuffered. Also echoes all line input
if not in quiet mode (-q). Useful when piping.
- -v
- Display version number,
compilation options used, maximum possible memory usage, then exit.
- -w
- Set
wide output mode for an unlimited width output device like the "set wide"
command does. Sets infinite screen columns and rows so that 2D (two dimensional)
expression output will always succeed and not be downgraded to 1D output
when it doesn’t fit in the display area. Use when redirecting output or with
a terminal emulator that doesn’t wrap lines. This mode only affects 2D output.
- -x
- Enable HTML output mode (which is also valid XHTML). This makes Mathomatic
output suitable for inclusion in a web page. The color mode and bold colors
flags affect this mode, allowing HTML color output. Wide output mode is
also set by this option, meaning expressions will always be displayed in
2D.
After any options, text files may be specified on the shell
command line that will be automatically read in with the read command,
unless the -e option is specified.
Mathomatic is best run from within a
terminal emulator. It uses console line input and output for the user interface.
First you type in your mathematical equations in standard infix notation,
then you can solve them by typing in the variable name at the prompt, or
perform operations on them with simple English commands. Type "help" or
"?" for the help command. If the command is longer than 4 letters, you only
need to type in the first 4 letters. Most commands operate on the current
equation by default.
A command preceded by an exclamation point (such as
"!ls") is taken to be a shell command and is passed unchanged to the shell
(/bin/sh). "!" by itself invokes the default shell, which is specified in
the SHELL environment variable. "!" is also the factorial operator.
Complete
documentation is available in HTML format; see the local documentation
directory or online at "http://mathomatic.org/math/doc/
" for the latest
Mathomatic documentation.
- EDITOR
- The EDITOR environment variable
specifies which text editor to use for the edit command.
- ~/.mathomaticrc
- Optional startup file containing Mathomatic set command options. It should
be a text file with one set option per line. Do not include the word "set".
For example, the line "no color" will make Mathomatic default to non-color
mode, which is useful if you aren’t using a standard ANSI terminal emulator.
Mathomatic has been written by George Gesslein II (gesslein@linux.com)
with kind help from John Blommers ("http://www.blommers.org") and the Internet
community. It is free software, available under the terms and conditions
of the GNU Lesser General Public License from "http://www.mathomatic.org
".
The command to take the limit of an expression is partially
functional and experimental. All else should work perfectly; if not, please
report it as a bug to the author or on the Launchpad website: "https://launchpad.net/mathomatic
".
matho-primes(1)
, primorial(1)
, matho-mult(1)
, matho-sum(1)
, matho-pascal(1)
,
matho-sumsq(1)
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