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48 bgnbd.PlotTrackingCum
bgnbd.PlotTrackingCum
BG/NBD Tracking Cumulative Transactions Plot
Description
Plots the actual and expected cumulative total repeat transactions by all customers for the calibration
and holdout periods, and returns this comparison in a matrix.
Usage
bgnbd.PlotTrackingCum(params, T.cal, T.tot, actual.cu.tracking.data,
xlab = "Week", ylab = "Cumulative Transactions", xticklab = NULL,
title = "Tracking Cumulative Transactions")
Arguments
params
T.cal
BG/NBD parameters - a vector with r, alpha, a, and b, in that order. r and
alpha are unobserved parameters for the NBD transaction process. a and b are
unobserved parameters for the Beta geometric dropout process.
a vector to represent customers’ calibration period lengths (in other words, the
"T.cal" column from a customer-by-sufficient-statistic matrix).
T.tot
end of holdout period. Must be a single value, not a vector.
actual.cu.tracking.data
vector containing the cumulative number of repeat transactions made by customers
for each period in the total time period (both calibration and holdout
periods). See details.
xlab
ylab
xticklab
title
descriptive label for the x axis.
descriptive label for the y axis.
vector containing a label for each tick mark on the x axis.
title placed on the top-center of the plot.
Details
actual.cu.tracking.data does not have to be in the same unit of time as the T.cal data. T.tot
will automatically be divided into periods to match the length of actual.cu.tracking.data. See
bgnbd.ExpectedCumulativeTransactions.
The holdout period should immediately follow the calibration period. This function assume that
all customers’ calibration periods end on the same date, rather than starting on the same date (thus
customers’ birth periods are determined using max(T.cal) - T.cal rather than assuming that it is
0).
Value
Matrix containing actual and expected cumulative repeat transactions.