getElem

getElem_id

getElem_eyecol

getElem_eye

getElem_va

getElem_iop

id_chr

named list with strings for "r" and "l"
names have to be "r" and "l"!

eye_chr

named list with strings for "whole" and "part"
names have to be "whole" and "part"!

va_chr

iop_chr

Finds the element in an object for one of the following:<ul>
<li>ID</li>
<li>eye</li>
<li>Visual acuity</li>
</ul><code>getElem</code> search a vector, the column names (data frame) or the names (list)
Finds the element in an object for one of the following:<ul>
<li>ID column</li>
<li>eye column</li>
<li>columns that contain information for right/left eyes</li>
<li>Visual acuity</li>
</ul><code>getElem</code> search a vector, the column names (data frame) or the names (list)

internal

There is no ophthalmic researcher who has not had headaches from
the handling of visual acuity entries. Different notations, untidy entries.
This shall now be a matter of the past. Eye makes it as easy as pie to work
with VA data - easy cleaning, easy conversion between
Snellen, logMAR, ETDRS letters, and qualitative visual acuity
shall never pester you again. The eye
package automates the pesky task to count number of patients and eyes,
and can help to clean data with easy re-coding for right and left eyes.
It also contains functions to help reshaping eye side specific variables
between wide and long format. Visual acuity conversion is based on
Schulze-Bonsel et al. (2006) <doi:10.1167/iovs.05-0981>,
Gregori et al. (2010) <doi:10.1097/iae.0b013e3181d87e04>,
Beck et al. (2003) <doi:10.1016/s0002-9394(02)01825-1> and
Bach (2007) <http:michaelbach.de/sci/acuity.html>.

getElem: Find element based or strings

Description

Usage

Arguments

Value

See Also