data_pop: Remove last n rows or column or specified elements from a...

In quickcode: Quick and Essential 'R' Tricks for Better Scripts

Remove last n rows or column or specified elements from a data frame like array_pop in PHP

Description

Shorthand to remove elements from a data frame and save as the same name

Usage

data_pop(., n = 1, which = c("rows", "cols"), ret = FALSE)

Arguments

.	parent data
n	number of elements to remove
which	whether to remove from row or from column
ret	TRUE or FALSE. whether to return value instead of setting it to the parent data

Value

data with elements removed

Examples

#basic example: pop off 1 row from sample data
data.frame(ID=1:10,N=number(10)) #before
data_pop(data.frame(ID=1:10,N=number(10))) #after

#using data objects
data.01 <- mtcars[1:7,]

#task: remove 1 element from the end of the data and set it to the data name
data.01 #data.01 data before pop
data_pop(data.01) #does not return anything
data.01 #data.01 data updated after pop

#task: remove 3 columns from the end of the data and set it to the data name
data.01 #data.01 data before pop
data_pop(data.01, n = 3, which = "cols") #does not return anything, but updates data
data.01 #data.01 data updated after pop

#task: remove 5 elements from the end, but do not set it to the data name
data.01 #data.01 data before pop
data_pop(data.01,5, ret = TRUE) #return modified data
data.01 #data.01 data remains the same after pop

quickcode documentation built on April 11, 2025, 5:49 p.m.