Subsetting of pcaviz objects

Return subset of observations in pcaviz object.

# S3 method for pcaviz
subset(x, subset, …)

Arguments

x	An object of class "pcaviz".
subset	Logical expression indicating elements or rows to keep; missing values are taken as false.
…	Additional arguments to generic subset function. These additional arguments are not used here.

Value

A pcaviz object in containing data and PCA results for the selected elements only.

Note that unused levels are dropped from all factors (i.e., categorical variables).

See also

link{pcaviz}, subset, droplevels

Examples

  # Create the pcaviz object.
  data(iris)
  a <- pcaviz(prcomp(iris[1:4]),dat = iris)

  # Retain the subset of Iris samples in which the first PC is
  # positive. 
  b <- subset(a,PC1 > 0)