axis.break.table
,
axis.tick.table
, and
axis.label.table
are
tables with data that is used in time series
plotting to determine the style and placement of
axis ticks, axis tick labels, and axis breaks.
axis.break.table
is a named list whose
BreakSpan
element
is a time span vector, and whose other elements tell how to
treat an axis break with the corresponding span.
axis.tick.table
is a data frame whose
span
and
span.frac
columns correspond to data ranges per desired number of
tick marks for the x-axis, and whose
other columns tell how to generate time sequences for placing
the different sizes of axis ticks for those these ranges.
axis.label.table
is a data frame with information about
tick label formatting. Its
Units
column is a factor with several
different time units for the tick frequency,
which generally come from the medium ticks.
For each of those time units, there are
several styles of axis tick labels, corresponding to values of
the
Number
column, and the remaining columns of the data frame
tell how to format the main and outer labels for these styles,
and where to place the outer labels.
The following styles are pre-defined for various time units: