functions in graph.i - l
legend= plotting keyword
sets the legend for a plot. The default legend is a concatentation
of the strings used in the original plotting command (plg, plm, etc.),
except for the plt command, which has no default legend.
Legends are never plotted to the X window; use the plq command to
see them interactively. Legends will appear in hardcopy output
unless they have been explicitly turned off.
PLOTTING COMMANDS: plg, plm, plc, plv, plf, pli, plt, pldj
keyword, defined at i0/graph.i line 807
or limits, xmin, xmax, ymin, ymax,
square=0/1, nice=0/1, restrict=0/1
or old_limits= limits()
or limits, old_limits
In the first form, restores all four plot limits to extreme values.
In the second form, sets the plot limits in the current coordinate
system to XMIN, XMAX, YMIN, YMAX, which may be nil or omitted to
leave the corresponding limit unchanged, a number to fix the
corresponding limit to a specified value, or the string "e" to
make the corresponding limit take on the extreme value of the
currently displayed data.
If present, the square keyword determines whether limits marked
as extreme values will be adjusted to force the x and y scales
to be equal (square=1) or not (square=0, the default).
If present, the nice keyword determines whether limits will be
adjusted to nice values (nice=1) or not (nice=0, the default).
There is a subtlety in the meaning of "extreme value" when one
or both of the limits on the OPPOSITE axis have fixed values --
does the "extreme value" of the data include points which
will not be plotted because their other coordinate lies outside
the fixed limit on the opposite axis (restrict=0, the default),
or not (restrict=1)?
If called as a function, limits returns an array of 5 doubles;
OLD_LIMITS(1:4) are the current xmin, xmax, ymin, and ymax,
and int(OLD_LIMITS(5)) is a set of flags indicating extreme
values and the square, nice, restrict, and log flags.
In the fourth form, OLD_LIMITS is as returned by a previous
limits call, to restore the limits to a previous state.
In an X window, the limits may also be adjusted interactively
with the mouse. Drag left to zoom in and pan (click left to zoom
in on a point without moving it), drag middle to pan, and click
(and drag) right to zoom out (and pan). If you click just above
or below the plot, these operations will be restricted to the
x-axis; if you click just to the left or right, the operations
are restricted to the y-axis. A shift-left click, drag, and
release will expand the box you dragged over to fill the plot
(other popular software zooms with this paradigm). If the
rubber band box is not visible with shift-left zooming, try
shift-middle or shift-right for alternate XOR masks. Such
mouse-set limits are equivalent to a limits command specifying
all four limits EXCEPT that the unzoom command can revert to
the limits before a series of mouse zooms and pans.
The limits you set using the limits or range functions carry over
to the next plot -- that is, an fma operation does NOT reset the
limits to extreme values.
builtin function, documented at i0/graph.i line 658
logxy, xflag, yflag
sets the linear/log axis scaling flags for the current coordinate
system. XFLAG and YFLAG may be nil or omitted to leave the
corresponding axis scaling unchanged, 0 to select linear scaling,
or 1 to select log scaling.
builtin function, documented at i0/graph.i line 728