axisIntervals function

Mark Intervals on a Plot Axis

Adds an axis (axisintervals) or two axes (axesIntervals) to the current plot with tick marks delimiting interval described by labels

axisIntervals(side=1, atTick1=fda::monthBegin.5, atTick2=fda::monthEnd.5,
      atLabels=fda::monthMid, labels=month.abb, cex.axis=0.9, ...)
axesIntervals(side=1:2, atTick1=fda::monthBegin.5, atTick2=fda::monthEnd.5,
      atLabels=fda::monthMid, labels=month.abb, cex.axis=0.9, las=1, ...)

Arguments

• side: an integer specifying which side of the plot the axis is to be drawn on. The axis is placed as follows: 1=below, 2=left, 3=above and 4=right.
• atTick1: the points at which tick-marks marking the starting points of the intervals are to be drawn. This defaults to 'monthBegin.5' to mark monthly periods for an annual cycle. These are constructed by calling axis(side, at=atTick1, labels=FALSE, ...). For more detail on this, see 'axis'.
• atTick2: the points at which tick-marks marking the ends of the intervals are to be drawn. This defaults to 'monthEnd.5' to mark monthly periods for an annual cycle. These are constructed by calling axis(side, at=atTick2, labels=FALSE, ...). Use atTick2=NA to rely only on atTick1. For more detail on this, see 'axis'.
• atLabels: the points at which 'labels' should be typed. These are constructed by calling axis(side, at=atLabels, tick=FALSE, ...). For more detail on this, see 'axis'.
• labels: Labels to be typed at locations 'atLabels'. This is accomplished by calling axis(side, at=atLabels, labels=labels, tick=FALSE, ...). For more detail on this, see 'axis'.
• cex.axis: Character expansion (magnification) used for axis annotations ('labels' in this function call) relative to the current setting of 'cex'. For more detail, see 'par'.
• las: line axis style; see par.
• ...: additional arguments passed to axis.

Returns

The value from the third (labels) call to 'axis'. This function is usually invoked for its side effect, which is to add an axis to an already existing plot.

axesIntervals calls axisIntervals(side[1], ...) then axis(side[2], ...).

Side Effects

An axis is added to the current plot.

Author(s)

Spencer Graves

References

Ramsay, James O., Hooker, Giles, and Graves, Spencer (2009), Functional data analysis with R and Matlab, Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2005), Functional Data Analysis, 2nd ed., Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2002), Applied Functional Data Analysis, Springer, New York.

See Also

axis, par

monthBegin.5

monthEnd.5

monthMid

month.abb

monthLetters

Examples

oldpar <- par(no.readonly= TRUE)
daybasis65 <- create.fourier.basis(c(0, 365), 65)

daytempfd <- with(CanadianWeather, smooth.basis(
       day.5,  dailyAv[,,"Temperature.C"], 
       daybasis65, fdnames=list("Day", "Station", "Deg C"))$fd )

with(CanadianWeather, plotfit.fd(
      dailyAv[,,"Temperature.C"], argvals=day.5,
          daytempfd, index=1, titles=place, axes=FALSE) )
# Label the horizontal axis with the month names
axisIntervals(1)
axis(2)
# Depending on the physical size of the plot,
# axis labels may not all print.
# In that case, there are 2 options:
# (1) reduce 'cex.lab'.
# (2) Use different labels as illustrated by adding
#     such an axis to the top of this plot

with(CanadianWeather, plotfit.fd(
      dailyAv[,,"Temperature.C"], argvals=day.5,
          daytempfd, index=1, titles=place, axes=FALSE) )
# Label the horizontal axis with the month names
axesIntervals()

axisIntervals(3, labels=monthLetters, cex.lab=1.2, line=-0.5)
# 'line' argument here is passed to 'axis' via '...'
par(oldpar)