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 numerical arithmetic is double precision
floating point with approximately 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. Works the same as entering them 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.
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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