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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 simple 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
autoselect option is turned off. Useful for quick command-line calculations.
The startup messages are not displayed with this option. Follow this option
with "--" so that expressions can start with a minus sign (-).
- -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 messages 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 (forking). 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 (rc) 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 and PDF formats; 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.
"rc" stands for "run cold".
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.
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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