nv: Create a named vector from a dataframe, table or vector

In caroline: A Collection of Database, Data Structure, Visualization, and Utility Functions for R

Create a named vector from a dataframe, table or vector

Description

The '$' or "[," operators for dataframes and tables do not carry along with them the row names. This function provides a solution for this problem. Additionally this function will accept a vector of values and a corresponding vector of value names–an ideal, in-line way for setting named-vectors as default parameters in new functions.)

Usage

nv(x, name)

Arguments

x	The source dataframe, table, vector, or factor
name	The column name you would like to pull out as a named vector. OR the names of the vector (if x is a vector)

Value

a named vector or factor

Author(s)

David Schruth

See Also

vector,name

Examples

## example 1: pulling a row.named vector out of a dataframe
df <- data.frame(a=c(1,2,34,4,5,3,23), b=c('z','x','y','z','x','n','p'))
rownames(df) <- letters[1:nrow(df)]
nv(df,'a')
nv(df,'b')

## example 2: a naming vectors from scratch
nv(c(1,2,3), c('a','b','c'))
nv(df$a, df$b)

caroline documentation built on Oct. 21, 2024, 9:06 a.m.