logicalToBinary

<p>dataframe which may contain logical fields</p>

<p>when saving data as text files for distribution, printing large
  amounts of text containing TRUE and FALSE is inefficient. Convert to binary
  takes more R memory, but allows more compact output TODO: test</p>

manip

internal

Calculate comorbidities, and perform fast and accurate
validation, conversion, manipulation, filtering and comparison of ICD-9-CM
(clinical modification) codes. ICD-9 codes appear numeric but leading and
trailing zeroes, and both decimal and non-decimal "short" format codes
exist. The package enables a work flow from raw lists of ICD-9 codes from
hospital billing databases to comorbidities. ICD-9 to comorbidity mappings
from Quan (Deyo and Elixhauser versions), Elixhauser and AHRQ included.

Jack O Wasey

Data Engineering and BI courses are free this week!

logicalToBinary: encode TRUE as 1, and FALSE as 0 (integers)

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