.\" -*- nroff -*- generated from .Rd format
.BG
.FN sortedXyData
.TL
Create a sortedXyData object
.DN
This is a constructor function for the class of `sortedXyData'
objects.  These objects are mostly used in the `initial'
function for a self-starting nonlinear regression model, which will be
of the `selfStart' class.
.CS
sortedXyData(x, y, data)
.RA
.AG x
a numeric vector or an expression that will evaluate in
`data' to a numeric vector 
.AG y
a numeric vector or an expression that will evaluate in
`data' to a numeric vector 
.AG data
an optional data frame in which to evaluate expressions
for `x' and `y', if they are given as expressions 
.RT
A `sortedXyData' object. This is a data frame with exactly
two numeric columns, named `x' and `y'.  The rows are
sorted so the `x' column is in increasing order.  Duplicate
`x' values are eliminated by averaging the corresponding `y'
values.

.SA
`selfStart', `NLSstClosestX',
`NLSstLfAsymptote', `NLSstRtAsymptote'
.EX
DNase.2 <- DNase[ DNase$Run == "2", ]
sortedXyData( expression(log(conc)), expression(density), DNase.2 )
.KW data
.WR
