added calc.zcent()
for computing the standardized values of a variable for each subject
added calc.fun()
for computing arbitrary summary statistics for each subject
in lagvar()
, added time
argument (that allows for computing the time difference between lagged observations) and made the examples for this function more complete
in lagvar()
, moved id
argument to the second position and made obs
argument optional
added mvvar()
and rename()
functions
added aggreg()
function
added nsub()
, calc.mean()
, and calc.mcent()
functions
added calc.nomiss()
for computing the number of non-missing values for a particular variable
added check.nodup()
to check if a variable has no duplicated values for each subject
added check.nomiss()
and updated check.timeinvar()
to provide more output options
started using Travis CI (https://travis-ci.org/wviechtb/esmpack)
started on pkgdown website
added check.timeinvar()
and get.timeinvar()
functions
added combitems()
and lagvar()
functions
initial setup for GitHub
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