Begin/End Relations between Events

relations between begin and end of events

getEventRelations(events, referenceName, partnerName,
  parallelEventInfo = NULL, dbg = TRUE)

Arguments

events

list of event lists (in a data frame), as e.g. returned by getEventsWithStatisticsForMultipleSeries

referenceName

name of column in parallelEventInfo containing the numbers of the events to which the events in column partnerName are to be compared.

partnerName

name of column in parallelEventInfo containing the numbers of the events which are compared to the events in column partnerName.

parallelEventInfo

data frame as returned by getParallelEventsInfo. If NULL, events must be specified.

dbg

if TRUE, debug messages are shown.

Examples

# Load example data set containing a list of rain events at different gauges
data(rainEvents)
  
cat(sprintf(
  "Event lists available for: %s\n", 
   paste(names(rainEvents), collapse = ", ")
))
#> Event lists available for: BlnX, BlnIX, BlnXI, Wil, Wila, Kar, ZhlI, StgI, Mal, Wit, ReiI
  
# How are rain events in BlnX related to rain events in Wil?
eventRelations <- getEventRelations(
  events = rainEvents, 
  referenceName = "BlnX", 
  partnerName = "Wil"
)
#> referenceEventNumber: 1 -> 1  partner events found.
#> referenceEventNumber: 2 -> 1  partner events found.
#> referenceEventNumber: 3 -> 1  partner events found.
#> referenceEventNumber: 4 -> 1  partner events found.
#> referenceEventNumber: 5 -> 1  partner events found.
#> referenceEventNumber: 6 -> 1  partner events found.
#> referenceEventNumber: 7 -> 1  partner events found.
#> referenceEventNumber: 8 -> 1  partner events found.
#> referenceEventNumber: 9 -> 1  partner events found.
#> referenceEventNumber: 10
#> No partner event at Wil found for event10 at BlnX
#> referenceEventNumber: 11 -> 1  partner events found.
#> referenceEventNumber: 12 -> 2  partner events found.
#> referenceEventNumber: 13
#> No partner event at Wil found for event13 at BlnX
#> referenceEventNumber: 14
#> No partner event at Wil found for event14 at BlnX
#> referenceEventNumber: 15
#> No partner event at Wil found for event15 at BlnX
#> referenceEventNumber: 16
#> No partner event at Wil found for event16 at BlnX
  
# Let's have a look at the output
eventRelations
#>    event1 event2 beginRelation endRelation
#> 1       1      2  beginsBefore   endsAfter
#> 2       2      3   beginsAfter  endsBefore
#> 3       3      4  beginsBefore   endsAfter
#> 4       4      5  beginsBefore   endsAfter
#> 5       5      6   beginsAfter   endsAfter
#> 6       6      7  beginsBefore      endsAt
#> 7       7      8      beginsAt  endsBefore
#> 8       8      9   beginsAfter      endsAt
#> 9       9     10  beginsBefore   endsAfter
#> 10     11     12  beginsBefore  endsBefore
#> 11     12     13   beginsAfter  endsBefore
#> 12     12     14   beginsAfter  endsBefore
  
# Example 1: partner events that are fully containing the reference events
isContaining <- eventRelations$beginRelation == "beginsBefore" & 
eventRelations$endRelation == "endsAfter"
  
# The following table relates numbers of "partner" events (event2) to numbers
# of "reference" events (event1) for each case in which a reference event is
# fully contained in a partner event.
containing <- eventRelations[isContaining, ]
  
# Let's check this graphically:
  
# Define plot matrix of two rows and one column
old.par <- graphics::par(mfrow = c(2, 1))
  
ganttPlotEvents(
  events = rainEvents$BlnX[], 
  indicate = containing$event1, 
  ylim = c(1, 2.8), 
  title = "BlnX",
  indicationColour = "blue"  
)
  
ganttPlotEvents(
  rainEvents$Wil, 
  indicate = containing$event2, 
  add = TRUE, 
  y1 = 1.8, 
  title = "Wil"
)
  
graphics::title("Events at Wil (red), fully containing events at BlnX (blue)")
  
# Example 2: partner events that are starting before the reference event starts
# and ending before the reference event ends
isOverlappingLeft <- eventRelations$beginRelation == "beginsBefore" & 
eventRelations$endRelation == "endsBefore"
  
overlappingLeft <- eventRelations[isOverlappingLeft, ]
  
# Again, check this graphically:
ganttPlotEvents(
  events = rainEvents$BlnX[], 
  indicate = overlappingLeft$event1, 
  ylim = c(1, 2.8), 
  title = "BlnX",
  indicationColour = "blue"  
)
  
ganttPlotEvents(
  rainEvents$Wil, 
  indicate = overlappingLeft$event2, 
  add = TRUE, 
  y1 = 1.8, 
  title = "Wil"
)
  
graphics::title(paste(
  "Events at Wil (red), starting before the start and ending before",
  "the end\nof the events at BlnX (blue)"
))

  
# Reset graphical parameters
graphics::par(old.par)