dispersion,RepeatedRanking-method

dispersion

An object of class <code>RepeatedRanking</code>.

Specifies the dispersion measure, s. description.

measure

Specifies how the location parameter is computed. If <code>scheme="original"</code>, then the location parameter is chosen as the reference ranking
                 (slot <code>original</code>). If <code>scheme = "symmetric"</code>, then <code>original@ranking</code> and <code>rankings</code> are pooled to compute the
                 location parameter either as the joint mean (if <code>measure</code> = "mean") or the joint median (if <code>measure = "median"</code>). Alternatively,
                 the user may provide locations by using the <code>center</code> argument.

scheme

Location parameters to be used.
                 Used only if <code>scheme</code> = "user".

center

Dispersion is computed with respect to ranks, computed genewise. Three different measures
are implemented: standard deviation (<code>sd</code>), median absolute deviation (<code>mad</code>), and interquartile
range (<code>IQR</code>). The function is primarily intended to serve as helper function for <a href="/link/AggregatePenalty?package=GeneSelector&version=2.22.0" rd-options="" data-mini-rdoc="GeneSelector::AggregatePenalty">AggregatePenalty</a>.

univar

dispersion,RepeatedRanking

The term 'GeneSelector' refers to a filter selecting those
genes which are consistently identified as differentially
expressed using various statistical procedures. 'Selected'
genes are those present at the top of the list in various
ranking methods (currently 14). In addition, the stability of
the findings can be taken into account in the final ranking by
examining perturbed versions of the original data set, e.g. by
leaving samples, swapping class labels, generating bootstrap
replicates or adding noise. Given multiple ranked lists, one
can use aggregation methods in order to find a synthesis.

Martin Slawski

GeneSelector

Stability and Aggregation of ranked gene lists

dispersion,RepeatedRanking function

Dispersion is computed with respect to ranks, computed genewise. Three different measures
are implemented: standard deviation (<code>sd</code>), median absolute deviation (<code>mad</code>), and interquartile
range (<code>IQR</code>). The function is primarily intended to serve as helper function for <a href="AggregatePenalty" rd-options="">AggregatePenalty</a>.

dispersion,RepeatedRanking: Compute genewise dispersion measures for repeated rankings

Description

Usage

Arguments

Value

See Also