psych: headtail – R documentation

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headtail

Combine calls to head and tail

Description

A quick way to show the first and last n lines of a data.frame, matrix, or a text object. Just a pretty call to head and tail or View

Usage

headTail(x, top=4,bottom=4,from=1,to=NULL, digits=2, hlength = 4, tlength =4, 
ellipsis=TRUE) 
headtail(x,hlength=4,tlength=4,digits=2,ellipsis=TRUE,from=1,to=NULL)
topBottom(x, top=4,bottom=4,from=1,to=NULL, digits=2, hlength = 4, tlength = 4) 
quickView(x,top=8,bottom=8,from=1,to=NULL)

Arguments

`x`	A matrix or data frame or free text
`top`	The number of lines at the beginning to show
`bottom`	The number of lines at the end to show
`digits`	Round off the data to digits
`ellipsis`	Separate the head and tail with dots (ellipsis)
`from`	The first column to show (defaults to 1)
`to`	The last column to show (defaults to the number of columns
`hlength`	The number of lines at the beginning to show (an alias for top)
`tlength`	The number of lines at the end to show (an alias for bottom)

Value

The first top and last bottom lines of a matrix or data frame with an ellipsis in between. If the input is neither a matrix nor data frame, the output will be the first top and last bottom lines.

For each line, just columns starting at from and going to to will be displayed. Bt default, from = 1 and to = the last column.

topBottom is just a call to headTail with ellipsis = FALSE and returning a matrix output.

quickView is a call to View which opens a viewing window which is scrollable (if needed because the number of lines listed is more than a screen's worth). View (and therefore quickView) is slower than headTail or topBottom.

Examples

headTail(psychTools::iqitems,4,8,to=6) #the first 4 and last 6 items from 1 to 6
topBottom(psychTools::ability,from =2, to = 6) #the first and last 4 items from 2 to 6
headTail(psychTools::bfi,top=4, bottom=4,from =6,to=10) #the first and last 4 from 6 to 10
#not shown
#quickView(ability,hlength=10,tlength=10)  #this loads a spreadsheet like table

psych

Procedures for Psychological, Psychometric, and Personality Research

v2.1.3

GPL (>= 2)

Authors

William Revelle [aut, cre] (<https://orcid.org/0000-0003-4880-9610>)

Initial release

2021-03-21