ignore swap files
bump version in DESCRIPTION
better document SAS parsing into comorbidities
function to extract all LET defintions from SAS code
util: strip arbitrary string, not just space, and optionally drop empty results when multi matching
include Quan update of Deyo comorbidities (extracted from Quan's SAS code)
complete documentation of quan extract, make internal.
remove factor from icd9 lookup so ic9Explain works.
Also need decimal to short conversion in icd9Explain. Vignette example now works.
datadocs for Quan comorbidities
correct testthat contexts
add Elixhauser mapping
minimally test Quan and Elixhauser mappings
moved Elixhauser comorbidity calculation from icd9.R to comorbid.R
numerous corrections to the Elixhauser co-morbidities. Originally based off 'comorbidities' package, now corrected based on original Elixhauser paper, including V codes and .0 and .00 changes which can result in different codes when omitted.
minor updates to datadocs, vignette and tests
added possible new feature to README
fix documentation of Elixhauser
make Elixhauser mapping into short codes for consistency
additional test of V code ranges, to clarify intended behavior.
Fixed SAS LET tests.
added vignette section on ranges.
spacing
Rproj out of .gitignore. README to README.md which it already was in substance.