plotrix (version 2.1-5)

gantt.chart: Display a Gantt chart

Description

Displays a Gantt chart with priority coloring

Usage

gantt.chart(x=NULL,format="%Y/%m/%d",xlim=NULL,taskcolors=NULL,
  priority.legend=FALSE,vgridpos=NULL,vgridlab=NULL,half.height=0.25,
  hgrid=FALSE,main="",ylab="")

Arguments

x

a list of task labels, start/end times and task priorities as returned by get.gantt.info. If this is not present, get.gantt.info will be called.

format

the format to be used in entering dates/times (see strptime).

xlim

the horizontal limits of the plot.

taskcolors

a vector of colors used to illustrate task priority.

priority.legend

Whether to display a priority color legend.

vgridpos

optional positions of the vertical grid lines

vgridlab

optional labels for the vertical grid lines

half.height

the proportion of the spacing between task bars that will be filled by the bar on each side - 0.5 will leave no space

hgrid

logical - whether to display grid lines between the bars

main

the title of the plot - note that this is actually displayed using mtext.

ylab

vertical axis label - usually suppressed.

Value

• The list used to create the chart - see get.gantt.info for details. This can be saved and reused rather than manually entering the information each time the chart is displayed.

Details

If task priority colors are not wanted, simply mark every task as priority 1 or set taskcolors to a single value to suppress the coloring.

See Also

get.gantt.info

Examples

Ymd.format<-"%Y/%m/%d"
 gantt.info<-list(labels=
  c("First task","Second task","Third task","Fourth task","Fifth task"),
  starts=
  as.POSIXct(strptime(
  c("2004/01/01","2004/02/02","2004/03/03","2004/05/05","2004/09/09"),
  format=Ymd.format)),
  ends=
  as.POSIXct(strptime(
  c("2004/03/03","2004/05/05","2004/05/05","2004/08/08","2004/12/12"),
  format=Ymd.format)),
  priorities=c(1,2,3,4,5))
 vgridpos<-as.POSIXct(strptime(c("2004/01/01","2004/02/01","2004/03/01",
  "2004/04/01","2004/05/01","2004/06/01","2004/07/01","2004/08/01",
  "2004/09/01","2004/10/01","2004/11/01","2004/12/01"),format=Ymd.format))
 vgridlab<-
  c("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec")
 gantt.chart(gantt.info,main="Calendar date Gantt chart (2004)",
  priority.legend=TRUE,vgridpos=vgridpos,vgridlab=vgridlab,hgrid=TRUE)