lnTransform {flowCore} | R Documentation |
Create the definition of the ln Transformation that will be applied on some
parameter via the transform
method. The definition of this function
is currently x<-log(x)*(r/d). The transformation would normally be used to
convert to a linear valued parameter to the natural logarithm scale.
Typically r and d are both equal to 1.0. Both must be positive.
lnTransform(transformationId="defaultLnTransform", r=1, d=1)
transformationId |
character string to identify the transformation |
r |
positive double that corresponds to a scale factor. |
d |
positive double that corresponds to a scale factor |
Returns an object of class transform
.
B. Ellis and N. LeMeur
Other Transform functions:
arcsinhTransform()
,
biexponentialTransform()
,
inverseLogicleTransform()
,
linearTransform()
,
logTransform()
,
logicleTransform()
,
quadraticTransform()
,
scaleTransform()
,
splitScaleTransform()
,
truncateTransform()
data(GvHD) lnTrans <- lnTransform(transformationId="ln-transformation", r=1, d=1) ln1 <- transform(GvHD, transformList('FSC-H', lnTrans)) opar = par(mfcol=c(2, 1)) plot(density(exprs(GvHD[[1]])[ ,1]), main="Original") plot(density(exprs(ln1[[1]])[ ,1]), main="Ln Transform")