detrend

Polynomial de-trend transformation of row observations (e.g. spectra) of a dataset. The function fits an orthogonal polynom of a given degree to each observation and returns the residuals.

datagen

Data exploration and prediction with focus on high dimensional data and chemometrics.
The package was initially designed about partial least squares regression and discrimination models and variants, in particular locally weighted PLS models (LWPLS). Then, it has been expanded to many other methods for analyzing high dimensional data.
The name 'rchemo' comes from the fact that the package is orientated to chemometrics, but most of the provided methods are fully generic to other domains.
Functions such as transform(), predict(), coef() and summary() are available. Tuning the predictive models is facilitated by generic functions gridscore() (validation dataset) and gridcv() (cross-validation). Faster versions are also available for models based on latent variables (LVs) (gridscorelv() and gridcvlv()) and ridge regularization (gridscorelb() and gridcvlb()).

Marion Brandolini-Bunlon

rchemo

Dimension Reduction, Regression and Discrimination for
Chemometrics

Benoit Jaillais

Jean-Michel Roger

Matthieu Lesnoff

detrend function

<dl>
<dt>X</dt>
<dd>X-data (\(n, p\)).</dd>
<dt>degree</dt>
<dd>Degree of the polynom.</dd>
</dl>

Arguments

Polynomial de-trend transformation of row observations (e.g. spectra) of a dataset. The function fits an orthogonal polynom of a given degree to each observation and returns the residuals.

Polynomial de-trend transformation — detrend

<dl>


<dt>X</dt>
<dd>X-data (\(n, p\)).</dd>


<dt>degree</dt>
<dd>Degree of the polynom.</dd>


</dl>

detrend: Polynomial de-trend transformation

Description

Usage

Value

Arguments

Details

Examples