| sortedXyData | R Documentation |
sortedXyData ObjectThis 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.
sortedXyData(x, y, data)
x | a numeric vector or an expression that will evaluate in |
y | a numeric vector or an expression that will evaluate in |
data | an optional data frame in which to evaluate expressions for |
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.
José Pinheiro and Douglas Bates
selfStart, NLSstClosestX, NLSstLfAsymptote, NLSstRtAsymptote
DNase.2 <- DNase[ DNase$Run == "2", ] sortedXyData( expression(log(conc)), expression(density), DNase.2 )
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