subset: extract subset(s) from ICD data

In icd: Comorbidity Calculations and Tools for ICD-9 and ICD-10 Codes

Description

exactly the same as using x[n] or x[[n]] but preserves the ICD classes in result

Usage

## S3 method for class 'icd9'
x[...]

## S3 method for class 'icd9'
x[[...]]

## S3 method for class 'icd10'
x[...]

## S3 method for class 'icd10'
x[[...]]

Arguments

x	input data with list, vector, factor, and class set to an ICD type.
...	arguments passed on to other functions

Methods (by class)

• icd9: Extract ICD-9 codes

• icd9: Extract ICD-9 codes

• icd10: Extract ICD-10 codes

• icd10: Extract ICD-10 codes

Examples

x <- list(my_codes = as.icd9(c("V10.1", "441.1")))
x[1]
x[[1]]
x[[1]][2]
# subsetting a list should give the underlying data structure type,
# preserving the ICD class
stopifnot(!inherits(x[[1]], "list"))
stopifnot(!inherits(x[[1]][2], "list"))

y <- as.icd10(c("A01", "B0234"))
y[2]
y[[2]]
stopifnot(inherits(y[2], "icd10"))
stopifnot(inherits(y[[2]], "icd10"))

Example output

The 'icd9' package is deprecated, and should be removed to avoid conflicts with  'icd' . The 'icd' package up to version 2.1 contains tested versions of all the deprecated function names which overlap with those in the old 'icd9' package, e.g., 'icd9ComorbidAhrq' '. It is highly recommended to run the command: 'remove.packages("icd9")'
$my_codes
[1] "V10.1" "441.1"

[1] "V10.1" "441.1"
[1] "441.1"
[1] "B0234"
[1] "B0234"

icd documentation built on July 2, 2020, 4:07 a.m.