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Growth model of the reared sea urchin Paracentrotus ... - SciViews

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Annexes<br />

<strong>the</strong> names <strong>of</strong> <strong>the</strong> settable control values and <strong>the</strong>ir effect.<br />

trace: logical value indicating if a trace <strong>of</strong> <strong>the</strong> iteration progress<br />

should be printed. Default is `FALSE'. If `TRUE'<br />

intermediary results are printed at <strong>the</strong> end <strong>of</strong> each<br />

iteration.<br />

Details:<br />

Value:<br />

An `nlrq' object is a type <strong>of</strong> fitted <strong>model</strong> object. It has methods<br />

for <strong>the</strong> generic functions `coef' (parameters estimation at best<br />

solution), `formula' (<strong>model</strong> used), `deviance' (value <strong>of</strong> <strong>the</strong><br />

objective function at best solution), `print', `summary',<br />

`fitted' (vector <strong>of</strong> fitted variable according to <strong>the</strong> <strong>model</strong>),<br />

`predict' (vector <strong>of</strong> data points predicted by <strong>the</strong> <strong>model</strong>, using a<br />

different matrix for <strong>the</strong> independent variables) and also for <strong>the</strong><br />

function `tau' (quantile used for fitting <strong>the</strong> <strong>model</strong>, as <strong>the</strong> tau<br />

argument <strong>of</strong> <strong>the</strong> function). Fur<strong>the</strong>r help is also available for <strong>the</strong><br />

method `residuals'.<br />

A list consisting <strong>of</strong>:<br />

m: an `nlrqModel' object similar to an `nlsModel' in package nls<br />

data: <strong>the</strong> expression that was passed to `nlrq' as <strong>the</strong> data<br />

argument. The actual data values are present in <strong>the</strong><br />

environment <strong>of</strong> <strong>the</strong> `m' component.<br />

Author(s):<br />

Based on S code by Roger Koenker modified for R and to accept same<br />

<strong>model</strong>s as nls by Philippe Grosjean.<br />

References:<br />

See Also:<br />

Examples:<br />

Koenker, R. and Park, B.J. (1994). An Interior Point Algorithm for<br />

Nonlinear Quantile Regression, Journal <strong>of</strong> Econometrics, 71(1-2):<br />

265-283.<br />

`nlrq.control' , `residuals.nlrq'<br />

# Example using <strong>model</strong> defined in <strong>the</strong> nls library<br />

library(nls)<br />

# build artificial data with multiplicative error<br />

Dat

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