the approximate number of desired tick marks on the x-axis.
nobreaks
if
TRUE, do not use axis breaks;
if
FALSE, then
axis.compute.time.breaks is called to compute
possible times for axis breaks.
min.span
(if
nobreaks is
FALSE)
a time span object that is used to identify breaks
as those time periods without positions that exceed
min.span.
If
NULL, the default is selected from
axis.break.table based
on
min(diff(pos))
mkt.oc
(if
nobreaks is
FALSE)
TRUE or
FALSE to determine whether daily market opening and closing
times to use as axis breaks should be estimated from
pos;
can also be a list
with named
open and
close components giving the regular
opening and closing
times of the market to use for generating axis breaks.
The times are given as time span objects, representing the time after
midnight for the daily openings and closings of the market.
align.break
(if
nobreaks is
FALSE)
if
TRUE, the break intervals are extended so that the
intervals are aligned according to
by.align and
k.by.align.
by.align
(if
nobreaks is
FALSE)
a character string giving the time units for aligning
the intervals if
align.break is
TRUE.
Possible values are
"years",
"quarters",
"months",
"weeks",
"days",
"hours",
"minutes",
"minutes",
"seconds", or
"milliseconds".
If
NULL, the default is selected from
axis.break.table based
on
min(diff(pos))
k.by.align
(if
nobreaks is
FALSE)
an integer indicating the number of
by.align units for aligning.
If
NULL, the default is selected from
axis.break.table based
on
min(diff(pos))
extend
if
TRUE, the axis is extended past the range of
pos to the next
small tick mark.
skip.weekends
if
TRUE, the axis skips weekends if the time series has no
data on the weekends.
week.align
a character
string (or an integer, 0 to 6 with 0 being Sunday)
to specify a weekday to align weekly tick marks to.
The character string must
be sufficient to make a unique case-insensitive match to the strings
in
options("time.day.name").
tick.levels
a vector of character strings indicating which
tick marks are to be displayed.
Up to three types of tick marks are supported:
"small",
"medium", and
"big".
by.label
a character string specifying the calendar unit of the main labels,
used to choose the format from the
axis.label.style table.
Possible values of
by are
"milliseconds",
"seconds",
"minutes",
"hours",
"days",
"weeks",
"months",
"quarters", or
"years";
if
by is
NULL, it is read from
axis.info$tick.by.
k.by.label
an integer specifying the label increment in
number of calendar units corresponding to
by, used to
choose the format;
if
k.by is
NULL, it is read from
axis.info$tick.k.by.
style.number
an integer specifying the style number, to choose axis label
styles from
axis.label.table.
level.label
a character string specifying which level of tick marks should
be labeled, one of
"small",
"medium", or
"big".
placement
a character vector of length 2 specifying the placement of the
labels relative to the tick marks for the main and outer labels.
Possible choices for
placement are
"at.tick" and
"between.tick".
line.label
a numeric vector of length 2 specifying the number of lines away
from the axis on which to place the main and outer axis labels.
format.label
a character vector of length 2 specifying the label format for the main
and outer axis labels; the format strings must be
valid time formats as desribed in the documentation for the
timeDate class.
If it is
NULL, it is calculated from the other arguments.
side
an integer specifying the side on which the axis is to be placed:
1 for bottom or 3 for top.
This is used to determine the angle of a diagonal axis label.
diagonal
a logical vector of length 2 that, if
TRUE,
rotates the main or outer labels to produce a diagonal label.
This is especially useful for long labels, such as time of day, dates,
or unabbreviated day of week or months.
year.digits
an integer specifying the number of digits to use in labeling the year,
either 0, 2 or 4.
date.style
a character string specifying the style of the date:
"US" for month/day/year style and
"International" for day/month/year style.
alpha.sep.date
a character string used to separate the month, day, and year fields of the date
in alphabetical style of dates (e.g.,
Jan 3 1998).
numeric.sep.date
a character string used to separate the month, day, and year fields of the date
in numerical style of dates (e.g.,
1/3/1998).
day.style
a character string specifying the label style of the days.
Possible values are
"abb" for a 3 character abbreviation,
"abb1" for a 1 character abbreviation,
"name" for the full name,
and
"number" for the day of the month.
month.style
a character string specifying the label style of the months.
Possible values are
"abb" for a 3 character abbreviation,
"abb1" for a 1 character abbreviation,
"name" for a full name,
and
"number" (1-12).
quarter.style
a character string specifying the label style of the quarters.
Possible values are
"Q1",
"1Q", and "I".
zerofill
if
TRUE, numeric days and months will be zero-filled in dates
(e.g., 01/01/98 versus 1/1/98).
time.of.day.style
a character string specifying the label style for the time of day.
Possible values are 12:00 or
12 for a twelve hour clock without
printing AM or PM,
"am.pm" for a twelve hour clock with AM or PM printed,
and
"24" or "24:00"for a twenty-four hour clock. The difference
between
"12" and "12:00" is that if the labels are every hour or
more, the latter will print the
":00" after the hours.
add.outer
if
TRUE, an outer label to be displayed if appropriate for the label style.
reference.grids
if
TRUE, reference grids will be added.
break.width
width for axis breaks, as a fraction of the plotting region.
break.max.width
maximum total width for axis breaks, as a fraction of the plotting region.
at
if not
NULL, put ticks and labels
for the tick level given by
level.label
at these values, instead of calculating "pretty" values. Note that this
does not override the axis limits.
labels
if not
NULL, and
at != NULL as well,
this character vector is used for the labels instead of formatting the
tick positions.
xlim
range limit for axis.
VALUE:
a list with components
ticks
information for rendering the tick marks, calculated by
axis.time.tick.
labels
information for rendering the tick labels, calculated by
axis.time.label.
breaks
information for rendering the tick breaks, calculated by
axis.time.breaks.
grid
information for rendering the reference grid lines, calculated by
axis.time.grid
.
scale
information for mapping from user coordinates to plot coordinates,
calculated by
axis.time.scale.
line
an empty list, letting the axis line be plotted from its defaults.