NAME

	graph – draw a graph

SYNOPSIS

	graph [ option ... ]

DESCRIPTION

Graph with no options takes pairs of numbers from the standard input as abscissas (x-values) and ordinates (y-values) of a graph. Successive points are connected by straight lines. The graph is encoded on the standard output for display by plot(1) filters. If an ordinate is followed by a nonnumeric string, that string is printed as a label beginning on the point. Labels may be surrounded with quotes " " in which case they may be empty or contain blanks and numbers; labels never contain newlines. The following options are recognized, each as a separate argument. −a    Supply abscissas automatically; no x-values appear in the input. Spacing is given by the next argument (default 1). A second optional argument is the starting point for automatic abscissas (default 0, or 1 with a log scale in x, or the lower limit given by −x). −b    Break (disconnect) the graph after each label in the input. −c    Character string given by next argument is default label for each point. −g    Next argument is grid style, 0 no grid, 1 frame with ticks, 2 full grid (default). −l    Next argument is a legend to title the graph. Grid ranges are automatically printed as part of the title unless a −s option is present. −m    Next argument is mode (style) of connecting lines: 0 disconnected, 1 connected. Some devices give distinguishable line styles for other small integers. Mode –1 (default) begins with style 1 and rotates styles for successive curves under option −o. −o    (Overlay.) The ordinates for n superposed curves appear in the input with each abscissa value. The next argument is n. −s    Save screen; no new page for this graph. −x lIf l is present, x-axis is logarithmic. Next 1 (or 2) arguments are lower (and upper) x limits. Third argument, if present, is grid spacing on x axis. Normally these quantities are determined automatically. −y lSimilarly for y. −e    Make automatically determined x and y scales equal. −h    Next argument is fraction of space for height. −w    Similarly for width. −r    Next argument is fraction of space to move right before plotting. −u    Similarly to move up before plotting. −t    Transpose horizontal and vertical axes. (Option −a now applies to the vertical axis.) If a specified lower limit exceeds the upper limit, the axis is reversed.

SOURCE

	/usr/local/plan9/src/cmd/graph

SEE ALSO

	plot(1), grap(1)

BUGS

	Segments that run out of bounds are dropped, not windowed. Logarithmic axes may not be reversed. Option −e actually makes automatic limits, rather than automatic scaling, equal.