I've sent Martin Maechler details of a couple more bugs.
(1) The line columns <- nrow(b.intervals) is wrong. It should be
columns <- nrow(a.intervals)
(2) Following each of the lines that generate values for id, one needs
if (any(is.na(id))) id[is.na(id)] <- FALSE
This is to deal with missing values in conditioning variables.
I have made several sugegstions about warnings when there are missing
values and labelling when show.given is FALSE.
John Maindonald email : john.maindonald at anu.edu.au
Statistical Consulting Unit, phone : (6249)3998
c/o CMA, SMS, fax : (6249)5549
John Dedman Mathematical Sciences Building
Australian National University
Canberra ACT 0200
Australia
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