NEWS

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BTYDplus 1.2.0 (2021-01-21)

• add 'legend' argument to '(m)bgcnbd.PlotTrackingInc', '(m)bgcnbd.PlotTrackingCum', 'mcmc.PlotTrackingCum', and 'mcmc.PlotTrackingInc'
• made vignette code compatible with BTYD 2.4.2
• deprecated inefficient alternative sampling method for Pareto/NBD MCMC
• updated referenced URLs (to HTTPs or redirected pages)

BTYDplus 1.1.4

• 'elog2cbs' handles now empty elogs gracefully (#58)

BTYDplus 1.1.3

• limit simulated life length to 10k events in 'xbgcnbd.GenerateData'

BTYDplus 1.1.2

• fix 'mcmc.ExpectedCumulativeTransactions' for Pareto/NBD (Abe) with covariates (#55)
• add ability to provide covariates to 'abe.generateData'

BTYDplus 1.1.1

• added 'sales.x' to 'elog2cbs' output, which sums over sales in calibration, but excludes initial transaction (thanks to msinjin for the suggestion)

BTYDplus 1.1.0

• added '(m)bgcnbd.PlotFreqVsConditionalExpectedFrequency' methods
• added '(m)bgcnbd.PlotRecVsConditionalExpectedFrequency' methods

BTYDplus 1.0.2

• speed up 'xbgcnbd.EstimateParameters' by lowering lower bound of early stop to k=3

BTYDplus 1.0.1 (2016-12-14)

• reduce run time of tests and example code
• add source info to 'groceryElog' dataset

BTYDplus 1.0.0

• updated package Vignette
• bump in major version number to reflect intended first CRAN release

BTYDplus 0.11.3

• bug fix in MBG/CNBD-k demo which used a deprecated method name

BTYDplus 0.11.2

• add option 'date.zero' to specify start date for cohort in '*.GenerateData' methods

BTYDplus 0.11.1

• hot fix for broken 'elog2cbs' in '0.11.0' release

BTYDplus 0.11

• bug fix in Pareto/GGG demo

BTYDplus 0.11.0

• rewrote ‘*.GenerateData' methods * generated event log now also contains 'date' field * if 'T.cal' varies, then customer’s start date will also vary * use 'elog2cbs' internally to convert generated event log to CBS format; this also adds 'first' to CBS * '*.GenerateData' now always returns the event log -> argument 'return.elog' has been removed * fix bug for '*.GenerateData' in case of with highly varying 'T.cal' (fixes #42)
• fix top margin of 'mcmc.plotPActiveDiagnostic'

BTYDplus 0.10.2

• avoid internal C++ compile warning message
• R CMD CHECK now returns 0 errors and 0 warnings

BTYDplus 0.10.1

• add lintr checks for adhering to consistent code style
• run spellcheck for docs

BTYDplus 0.10.0

• add a package vignette
• add AppVeyor for automated build tests on Windows
• rename 'plotSampledTimingPatterns' to 'plotTimingPatterns'
• rename argument 'per' to 'units' for 'elog2cbs' to be consistent with 'difftime'
• fix 'elog2cbs': allow T.tot to be larger than max(elog$date)
• fix 'elog2inc' and 'elog2cum' to not report last week, if that is not complete
• only do bias correction for 'mbgcnbd.ConditionalExpectedTransactions' when we can safely assume that the whole customer cohort is passed
• ‘abe.mcmc.DrawParameters' can now handle data.table’s
• add ability to determine minimum number of transactions per customers to 'estimateRegularity'

BTYDplus 0.9.0

• add argument 'first' to 'elog2cum' and 'elog2inc'
• bugfix for 'elog2inc' and 'elog2cum' for elogs where dates are missing
• add 'groceryElog' dataset, and remove 'cdnow.sample()'
• use 'groceryElog' dataset for demos and examples
• 'elog2cbs' prunes columns, if 'elog$sales' or 'T.cal' is not provided

BTYDplus 0.8.3

• rewrite demos
• add 'plotSampledTimingPatterns' for plotting samples of timing patterns
• add 'mbgnbd.EstimateParameters' to estimate MBG/NBD model

BTYDplus 0.8.2

• improve documentation
• remove MBG/NBD methods, as these are easily accessible via the MBG/CNBD-k methods
• allow 'T.star' to be a vector in '*.GenerateData' methods for MCMC models

BTYDplus 0.8.0

• add * 'pnbd.GenerateData' * 'mcmc.pmf' * 'mcmc.Expectation' * 'mcmc.mcmc.ExpectedCumulativeTransactions' * 'mcmc.PlotTrackingCum' * 'mcmc.PlotTrackingInc' * 'mcmc.PlotFrequencyInCalibration'
• adapt 'bgcnbd.pmf' to return matrix in case that both 't' and 'x' are vectors
• dropp unnecessary 'cal.cbs' argument from 'mcmc.PAlive'
• allow flexible sample size in 'mcmc.DrawFutureTransactions'
• removeGammaGompertz/NBD due to broken 'ggnbd.ConditionalExpectedTransactions'

BTYDplus 0.7.2

• add new methods: 'elog2inc', 'elog2cum', 'cdnow.sample'
• improve documentation and demos

BTYDplus 0.7.1

• 'elog2cbs' now returns sum over sales for calibration and holdout period
• enhance CDNow demo with estimating of monetary component (i.e. CLV estimate)
• methods accepting 'params' check for names, if named vectors are passed

BTYDplus 0.7.0

• disable 'ggnbd.ConditionalExpectedTransactions'
• (m)bgcnbd.ConditionalExpectedTransactions uses same h2f1 method as BTYD, if GSL is not present
• add Travis-CI
• format R code with ‘formatR::tidy_dir(’R', indent=2)'

BTYDplus 0.6.4

• (m)bgcnbd.GenerateData can now handle multiple holdout period lengths, and differing calibration periods for each customer
• fix bias in (m)bgcnbd.ConditionalExpectedTransactions by re-scaling via (m)bgcnbd.Expectation

BTYDplus 0.6.3

• unconditional expectations for (M)BG/CNBD-k ('(m)bgcnbd.Expectation') are now calculated 'exact' by utilizing '(m)bgcnbd.pmf'

BTYDplus 0.6.1

• add implementation of: (m)bgcnbd.Expectation (m)bgcnbd.PlotFrequencyInCalibration, (m)bgcnbd.ExpectedCumulativeTransactions, (m)bgcnbd.PlotTrackingCum, (m)bgcnbd.PlotTrackingInc

BTYDplus 0.6.0

• add implementation of BG/CNBD-k model
• (m)bgcnbd.ConditionalExpectedTransactions uses original approximation again
• mbgcnbd.ConditionalExpectedTransactions can now handle customers with many (170+) transactions; thanks to Andrea Rumenjak for providing the patch;

BTYDplus 0.5.0

• rename model from CBG/CNBD to MBG/CNBD - function prefixes changed from cbgcnbd to mbgcnbd accordingly
• improve approximation logic for mbgcnbd.ConditionalExpectedTransactions

BTYDplus 0.4.0

• rename model from Pareto/CNBD to Pareto/GGG - function prefixes changed from pcnbd to pggg accordingly
• cust-column is assigned as names to list of level_1 CODA-objects returned by MCMC drawParameter methods - this makes it easier to access these via customer ID
• rename to cbgcnbd.EstimateRegularity() to estimateRegularity(), because the method is not bound to CBG/CNBD-k model - add tests and demo

BTYDplus 0.3.3

• add mc.cores parameter to MCMC methods to explicitely set number of parallel cores to be used
• important bug-fix for pcnbd.mcmc.DrawParameters - draw_tau slice-samples now from correct log_posterior in churn case
• more realistic test case for P/NBD MCMC, plus minor change to handling numeric underflow resulting in more accurate parameter estimates
• pcnbd.GenerateData now correctly considers fixed parameter value for k
• pcnbd.GenerateData has minimum level of 0.1 for generated k's in order to avoid itt's if 0

BTYDplus 0.3.2

• add mcmc.setBurnin method which cuts away (additional) initial burnin steps of MCMC chains
• '*.EstimateParameters' and '*.mcmc.DrawParameters' now also accept data.tables as input
• pcnbd.mcmc.plotRegularityRateHeterogeneity: add option to plot point estimates
• add mcmc.PActive and mcmc.plotPActiveDiagnostic

BTYDplus 0.3.1

• deprecated 'abe.mcmc.DrawFutureTransactions' and 'pcnbd.mcmc.DrawFutureTransactions' in favor of newly add 'mcmc.DrawFutureTransactions' method
• deprecated 'abe.mcmc.PAlive' and 'pcnbd.mcmc.PAlive' in favor of newly added 'mcmc.PAlive' method
• '*.mcmc.DrawParameters' now all consistenly return sampled 'z' values in their output