Displaying 1 result from an estimated 1 matches for "num_intervals".
2012 Apr 04
0
crosstabs and histograms with flexible binning of dates
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# LOAD FILE
#parcels=read.dbf() #depending on source file
parcels=read.delim("~/Projects/GIS_DATA/Parcels_NSP_BlockGroup.txt")
attach(parcels)
# DEFINE BINNING
basedate=as.Date("2011/05/11")
currentdate=basedate
interval=3 #width of interval in months. 3 = quarterly
num_intervals=5 #how many intervals to include after basedate
for (i in c(1:num_intervals)) {
startdate=currentdate
enddate=seq(startdate,by="month",length=interval)[interval] #create a
sequence of months of length "interval" and take last one.
# crosstab construction of single column...