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# File drawxaxis.R
# Part of the hydroTSM R package, https://github.com/hzambran/hydroTSM ;
# https://CRAN.R-project.org/package=hydroTSM
# Copyright 2008-2017 Mauricio Zambrano-Bigiarini
# Distributed under GPL 2 or later
################################################################################
# 'drawTimeAxis': It draws an X axies with daily, monthly, or annual time marks#
################################################################################
# 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 #
################################################################################
# Started: 2008 #
# Updates: March 2009, Nov 2010, April 2011 #
# 29-May-2013; #
# 04-Jul-2016 #
################################################################################
drawTimeAxis <- function(x, tick.tstep="auto", lab.tstep="auto", lab.fmt=NULL,
cex.axis=1, mgp=c(3, 2, 0), ... ) {
# Valid tseps for ''tick.tstep' and 'lab.tstep'
valid.tstep <- c("auto", "years", "quarters", "months", "weeks", "days",
"hours", "minutes", "seconds")
# Checking that the user provied a valid argument for 'tick.tstep'
if (is.na(match(tick.tstep, valid.tstep ) ) )
stop("Invalid argument: 'tick.tstep' must be in c('auto', 'years', 'quarters',
'months', 'weeks', 'days', 'hours', 'minutes', 'seconds')")
# Checking that the user provied a valid argument for 'lab.tstep'
if (is.na(match(lab.tstep, valid.tstep ) ) )
stop("Invalid argument: 'lab.tstep' must be in c('auto', 'years', 'quarters',
'months', 'weeks', 'days', 'hours', 'minutes', 'seconds')")
# 'lab.fmt': If the user didn't provide a value, default values are used
#if ( missing(lab.fmt) | is.null(lab.fmt) ) {
if ( is.null(lab.fmt) ) {
if (lab.tstep == "auto") {
lab.fmt <- TRUE
} else {
if (lab.tstep %in% c("years", "quarters", "months") ) {
lab.fmt <- "%b-%Y"
} else if (lab.tstep %in% c("weeks", "days") ) {
lab.fmt <- "%Y-%m-%d"
} else if (lab.tstep %in% c("hours", "minutes") ) {
lab.fmt <- "%b %d %H:%M"
} else lab.fmt <- "%d %H:%M:%S"
} # ELSE end
} # IF end
# # Margin line values (in mex units) for the axis title, axis labels and axis line
# if (lab.tstep == "auto") {
# mgp = c(3, 2, 0)
# } else mgp = c(3, 1, 0)
# Ticks: Draws the ticks for the time series in the x axis, without labels
if (tick.tstep == "auto") {
ticks <- x
} else ticks <- suppressWarnings(to.period(x, period=tick.tstep, indexAt='startof')) #xts::to.period
ticks.coords <- xy.coords(.index(ticks), ticks[, 1])
axis(side =1, at = ticks.coords$x, labels = FALSE, col = "#BBBBBB", ...)
# Labels: Computes the string for the labels of the X axis
if (lab.tstep == "auto") {
labs.dates <- suppressWarnings(axTicksByTime(x, ticks.on=lab.tstep, gt=1)) # xts::axTicksByTime ; xts::
labs.coords <- xy.coords(.index(x), x[, 1])
labs.lab <- names(labs.dates)
} else {
new.dates <- suppressWarnings(to.period(x, period=lab.tstep, indexAt='startof')) #xts::to.period
labs.dates <- match(index(new.dates), time(x))
labs.coords <- xy.coords(.index(x), x[, 1])
labs.lab <- format(time(new.dates), lab.fmt)
} # ELSE end
# Drawing the X axis
axis(side =1, at = labs.coords$x[labs.dates], labels = labs.lab, cex.axis = cex.axis, tcl = -0.7, mgp= mgp, ...)
if (lab.tstep != "auto") box()
} # 'drawTimeAxis' END
################################################################################
# 'drawxaxis': It draws an X axies with daily, monthly, or annual time marks #
################################################################################
# Started on 2008 #
# Updates: March 2009, Nov 2010, April 2011 #
# 08-May-2017 #
################################################################################
drawxaxis <- function(x, tick.tstep="auto", lab.tstep="auto", lab.fmt=NULL, cex.axis=1, mgp=c(3, 2, 0), ... ) {
drawTimeAxis(x, tick.tstep=tick.tstep, lab.tstep=lab.tstep, lab.fmt=lab.fmt, cex.axis=cex.axis, mgp=mgp, ... )
}
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