nonrepl: Sample variance of response.
In nlr: Nonlinear Regression Modelling using Robust Methods

Description Usage Arguments Details Value Author(s) References See Also Examples

Compute the sample standard deviation of response data$y at repeated predictor data$x.

1	nonrepl(data)

data

list of response data$y and predictor data$x.

If predictor x(i) repeated n_i times, the sample variance of response is compute for y(i,j), j=1,...,n_i.

list of result include standard deviations and information about repeated data as:

`x`	ordered data predictor.
`y`	ordered data response by predictor.
`xk`	nonrepeated data of x's.
`ni`	number of repeated of each xk's.
`xm`	position of each xk's in ordered x.
`k`	length of non repeated data, xk.
`xo`
`yq`
`ys`

Bunke et al. 1998.

This function provided by Bunke, O., Droge, B., Polzehl, J. Splus tools for model selection in nonlinear regression (1998) Computational Statistics, 13 (2), pp. 257-281.

zvalues, rzvalues