Class "squareroot"

Square root transform class, which represents a transformation defined by the function $$f(parameter,a)= \sqrt{ |{\frac{parameter}{a}|}}$$

Slots

.Data

Object of class "function"

a

Object of class "numeric" -- non-zero multiplicative constant

parameters

Object of class "transformation" -- flow parameter to be transformed.

transformationId

Object of class "character" -- unique ID to reference the transformation.

Note

The squareroot transformation object can be evaluated using the eval method by passing the data frame as an argument.The transformed parameters are returned as a column vector. (See example below)

Objects from the Class

Objects can be created by calls to the constructor squareroot(parameters,a,transformationId)

Extends

Class "singleParameterTransform", directly.

Class "transform", by class "singleParameterTransform", distance 2.

Class "transformation", by class "singleParameterTransform", distance 3.

Class "characterOrTransformation", by class "singleParameterTransform", distance 4.

References

Gating-ML Candidate Recommendation for Gating Description in Flow Cytometry

See also

dg1polynomial, ratio, quadratic

Other mathematical transform classes: EHtrans-class, asinht-class, asinhtGml2-class, dg1polynomial-class, exponential-class, hyperlog-class, hyperlogtGml2-class, invsplitscale-class, lintGml2-class, logarithm-class, logicletGml2-class, logtGml2-class, quadratic-class, ratio-class, ratiotGml2-class, sinht-class, splitscale-class, unitytransform-class

Examples

  dat <- read.FCS(system.file("extdata","0877408774.B08",
  package="flowCore"))
  sqrt1<-squareroot(parameters="FSC-H",a=2,transformationId="sqrt1")
  transOut<-eval(sqrt1)(exprs(dat))