Atari Mega Archive 1/Atari Mega Archive - Volume 1.iso/gnu/othergnu/gnuplt_x.zoo/gnuplot.gih

Text File | 1994-08-27 | 47KB | 1,263 lines

?
 GNUPLOT is a command-driven interactive function plotting program.  It
 is case sensitive (commands and function names written in lowercase
 are not the same as those written in CAPS).  All command names may be
 abbreviated, as long as the abbreviation is not ambiguous.  Any number
 of commands may appear on a line, separated by semicolons (;).

 Any command-line arguments are assumed to be names of files containing
 gnuplot commands. Each file is loaded with the `load` command, in the
 order specified. Gnuplot exits after the last file is processed.

 Commands may extend over several input lines, by ending each line but
 the last with a backslash (\). The backslash must be the LAST
 character on each line. The effect is as if the backslash and newline
 were not there. That is, no white space is implied, nor is a comment
 terminated. Therefore, commenting out a continued line comments out
 the entire command (see `comment`).

 In this documentation, curly braces ({}) denote optional arguments to
 many commands.

 For help on any topic, type 'help' followed by the name of the topic.
?clear
 The `clear` command erases the current screen or output device as
 specified by `set output`.  This usually generates a formfeed on
 hardcopy devices.  Use `set terminal` to set the device type.
?comments
 Comments are supported as follows: a # may appear in most places in a line
 and GNUPLOT will ignore the rest of the line. It will not have this
 affect inside quotes, inside numbers (including complex numbers), inside
 command substitutions, etc. In short, it works anywhere it makes sense
 to work.
?environment
 A number of shell environment variables are understood by GNUPLOT.
 None of these are required, but may be useful.

 If GNUTERM is defined, it is used as the name of the terminal type to
 be used. This overrides any terminal type sensed by GNUPLOT on start
 up, but is itself overridden by the .gnuplot (or equivalent) start-up
 file (see help start-up), and of course by later explicit changes.

 On Unix and MS-DOS, GNUHELP may be defined to be the pathname of the
 HELP file (gnuplot.gih).

 On VMS, the symbol GNUPLOT$HELP should be defined as the name of
 the help library for gnuplot.

 On Unix, HOME is used as the name of a directory to search for a
 .gnuplot file if none is found in the current directory.
 On MS-DOS, GNUPLOT is used.  On VMS, SYS$LOGIN: is used.
 See help start-up.

 On Unix, PAGER is used as an output filter for help messages. SHELL
 is used for the `shell` command.

 On MS-DOS, COMSPEC is used for the `shell` command.
?exit
?quit
 The commands `exit` and `quit` and your computer's END-OF-FILE character
 will exit GNUPLOT.  All these commands will clear the output device
 (as the `clear` command does) before exiting.
?expressions
 In general, any mathematical expression accepted by C, FORTRAN,
 Pascal, or BASIC is valid.  The precedence of these operators is
 determined by the specifications of the C programming language.
 White space (spaces and tabs) is ignored inside expressions.

 Complex constants may be expressed as the {<real>,<imag>}, where <real>
 and <imag> must be numerical constants.  For example {3,2}
 represents 3 + 2i; {0,1} represents `i` itself. The curly braces
 are explicitly required here.
?expressions functions
?functions
 The functions in GNUPLOT are the same as the corresponding functions
 in the UNIX math library, except that all functions accept integer,
 real, and complex arguments, unless otherwise noted.  The `sgn`
 function is also supported, as in BASIC.
?expressions functions abs
?functions abs
?abs
 The `abs` function returns the absolute value of its argument.  The
 returned value is of the same type as the argument.

 For complex arguments, abs(x) is defined as the length of x in the
 complex plane [i.e.,  sqrt(real(x)**2 + imag(x)**2) ].
?expressions functions acos
?functions acos
?acos
 The `acos` function returns the arc cosine (inverse cosine) of its
 argument.  `acos` returns its argument in radians.
?expressions functions arg
?functions arg
?arg
 The `arg` function returns the phase of a complex number, in radians.
?expressions functions asin
?functions asin
?asin
 The `asin` function returns the arc sin (inverse sin) of its argument.
 `asin` returns its argument in radians.
?expressions functions atan
?functions atan
?atan
 The `atan` function returns the arc tangent (inverse tangent) of its
 argument.  `atan` returns its argument in radians.
?expressions functions besj0
?functions besj0
?besj0
 The `besj0` function returns the j0th Bessel function of its argument.
 `besj0` expects its argument to be in radians.
?expressions functions besj1
?functions besj1
?besj1
 The `besj1` function returns the j1st Bessel function of its argument.
 `besj1` expects its argument to be in radians.
?expressions functions besy0
?functions besy0
?besy0
 The `besy0` function returns the y0th Bessel function of its argument.
 `besy0` expects its argument to be in radians.
?expressions functions besy1
?functions besy1
?besy1
 The `besy1` function returns the y1st Bessel function of its argument.
 `besy1` expects its argument to be in radians.
?expressions functions ceil
?functions ceil
?ceil
 The `ceil` function returns the smallest integer that is not less than its
 argument.  For complex numbers, `ceil` returns the smallest integer
 not less than the real part of its argument.
?expressions functions cos
?functions cos
?cos
 The `cos` function returns the cosine of its argument.  `cos` expects its
 argument to be in radians.
?expressions functions cosh
?functions cosh
?cosh
 The `cosh` function returns the hyperbolic cosine of its argument.
 `cosh` expects its argument to be in radians.
?expressions functions exp
?functions exp
?exp
 The `exp` function returns the exponential function of its argument
 (`e` raised to the power of its argument).
?expressions functions floor
?functions floor
?floor
 The `floor` function returns the largest integer not greater than its
 argument.  For complex numbers, `floor` returns the largest
 integer not greater than the real part of its argument.
?expressions functions imag
?functions imag
?imag
 The `imag` function returns the imaginary part of its argument as a
 real number.
?expressions functions int
?functions int
?int
 The `int` function returns the integer part of its argument, truncated
 toward zero.
?expressions functions log
?functions log
?log
 The `log` function returns the natural logarithm (base `e`) of its
 argument.
?expressions functions log10
?functions log10
?log10
 The `log10` function returns the logarithm (base 10) of its argument.
?expressions functions real
?functions real
?real
 The `real` function returns the real part of its argument.
?expressions functions sgn
?functions sgn
?sgn
 The `sgn` function returns 1 if its argument is positive, -1 if its
 argument is negative, and 0 if its argument is 0.  If the argument
 is a complex value, the imaginary component is ignored.
?expressions functions sin
?functions sin
?sin
 The `sin` function returns the sine of its argument.  `sin` expects its
 argument to be in radians.
?expressions functions sinh
?functions sinh
?sinh
 The `sinh` function returns the hyperbolic sine of its argument.  `sinh`
 expects its argument to be in radians.
?expressions functions sqrt
?functions sqrt
?sqrt
 The `sqrt` function returns the square root of its argument.
?expressions functions tan
?functions tan
?tan
 The `tan` function returns the tangent of its argument.  `tan` expects
 its argument to be in radians.
?expressions functions tanh
?functions tanh
?tanh
 The `tanh` function returns the hyperbolic tangent of its argument.
 `tanh` expects its argument to be in radians.
?expressions operators
?operators
 The operators in GNUPLOT are the same as the corresponding operators
 in the C programming language, except that all operators accept
 integer, real, and complex arg