str_extract

<p><code>stringr</code> does this, but here we have a small amount of base R code</p>

internal

Calculate comorbidities, Charlson scores, perform
fast and accurate validation, conversion, manipulation, filtering and
comparison of ICD-9 and ICD-10 codes. This package enables a work flow
from raw lists of ICD codes in hospital databases to
comorbidities. ICD-9 and ICD-10 comorbidity mappings from Quan (Deyo
and Elixhauser versions), Elixhauser and AHRQ included.  Common
ambiguities and code formats are handled.

Jack O Wasey

Tools for Working with ICD-9 and ICD-10 Codes, and Finding
Comorbidities

Jack O. Wasey

William Murphy

Anobel Odisho

Vitaly Druker

Ed Lee

Kevin Ushey

R Core Team 

str_extract function

<code>stringr</code> does this, but here we have a small amount of base R code — str_extract

<code>stringr</code> does this, but here we have a small amount of base R code

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str_extract: `stringr` does this, but here we have a small amount of base R code

Description

Usage

Arguments