Customized Time Axis — drawTimeAxis • hydroTSM

For a nice time series plot, this function draws a customized time axis, with annual, monthly, daily and sub-daily time marks and labels.

Usage

drawxaxis(x, tick.tstep = "auto", lab.tstep = "auto", 
          lab.fmt=NULL, cex.axis=1, mgp=c(3, 2, 0), ...)

Arguments

x: time series that will be plotted using the X axis that will be draw class(x) must be ts or zoo
tick.tstep: Character indicating the time step that have to be used for putting the ticks on the time axis. Valid values are: auto, years, quarters, months,weeks, days, hours, minutes, seconds.
lab.tstep: Character indicating the time step that have to be used for putting the labels on the time axis. Valid values are: auto, years, quarters, months,weeks, days, hours, minutes, seconds.
lab.fmt: Character indicating the format to be used for the label of the axis. See format in as.Date. If not specified (lab.fmt=NULL), it will try to use:
-) "%Y-%m-%d" when lab.tstep=="days",
-) "%b-%Y" when lab.tstep=="year" or lab.tstep=="month".
cex.axis: magnification of axis annotation relative to cex (See par).
mgp: The margin line (in mex units) for the axis title, axis labels and axis line (See par). Default value is mgp = c(3, 2, 0).
...: further arguments passed to the axis function or from other methods.

Note

From version 0.3-0 it changed its name from drawxaxis to drawTimeAxis, in order to have a more intuitive name. The old drawxaxis function is deprecated, but still be kept for compatibility reasons.

Author

Mauricio Zambrano-Bigiarini, mzb.devel@gmail

Examples

## Loading the SanMartino precipitation data
data(SanMartinoPPts)
x <- window(SanMartinoPPts, end=as.Date("1930-12-31"))

## Plotting the daily ts only, and then automatic 'x' axis
plot(x, xaxt = "n", xlab="Time")
drawTimeAxis(x) 

## Plotting the daily ts only, and then monthly ticks in the 'x' axis, 
## with annual labels.
plot(x, xaxt = "n", xlab="Time")
drawTimeAxis(x, tick.tstep="months", lab.tstep="years")