screePlot generates a scree plot with superimpose parallel analysis
screePlot(data, n.iter = 50, method = c("pc", "pa", "ml"), ...)Arguments
- data
a data frame or correlation matrix.
- n.iter
number of iterations for parallel analysis.
- method
factoring method (
pc,pa, orml).- ...
parameters passed to
psych::fa.parallel.
Value
a ggplot2 graph
Details
The screePlot function is a wrapper for the psych::parallel function.
A ggplot2 graph is produced with the scree plot and parallel analysis (scree plot for
simulated data) based on the method chosen. The methods are principal components ("pc"),
principal axis ("pa"), and maximum likelihood ("ml") factoring.
Examples
screePlot(Harman74.cor$cov, method="pc", n.obs=145)
#>
#> Note: parallel analysis suggests 3 components.
