predict-methods {cancerclass} | R Documentation

## Predict Method for 'predictor' Class

### Description

Assessment of the performance of a predictor in a test data set.

### Usage

      predict(object="predictor", ...)

### Arguments

`object` | Object of class `predictor`.
`...` | Further arguments described below.

### Value

A `prediction` object, see `prediction.object` for details. Objects of this class have a method for the function `plot`.

### Methods

object

  Object of class `predictor`.

eset

  Test set, stored in a Bioconductor ExpressionSet object.

positive

  String refering to one of the two classes. Sensitivity and specificity calculations are carried out with respect to this class.

class

  Specification of the column in `pData(eset)` that contains the class information. The default value is class="class".

ngenes

  Number of features used for classification. The default value is ngenes=50.

dist

  Character string specifiying the method for calculation of the distance between test samples and the centroids. Possible values are "euclidean", "angle", "center" and the default "cor".

### Details

The test samples are classified to the class with the nearest centroid. For methods are available for calculation of the distance between test samples and the centroids: Euclidean distance, euclidean distance after centering, angle and Pearson correlation. Calculation of distances is executed using the internal function `get.d`.

### See Also

`fit` `prediction` `predictor`

### Examples

    ### see: help(GOLUB);

[Package cancerclass version 1.28.0 Index]