VSS.scree

0th

Percentile

Plot the successive eigen values for a scree test

Cattell's scree test is one of most simple ways of testing the number of components or factors in a correlation matrix. Here we plot the eigen values of a correlation matrix as well as the eigen values of a factor analysis.

Keywords
multivariate, hplot
Usage
scree(rx,factors=TRUE,pc=TRUE,main="Scree plot",hline=NULL,add=FALSE) 
VSS.scree(rx, main = "scree plot")
Arguments
rx

a correlation matrix or a data matrix. If data, then correlations are found using pairwise deletions.

factors

If true, draw the scree for factors

pc

If true, draw the scree for components

hline

if null, draw a horizontal line at 1, otherwise draw it at hline (make negative to not draw it)

main

Title

add

Should multiple plots be drawn?

Details

Among the many ways to choose the optimal number of factors is the scree test. A better function to show the scree as well as compare it to randomly parallel solutions is found found in fa.parallel

References

https://personality-project.org/r/vss.html

See Also

fa.parallel VSS.plot, ICLUST, omega

Aliases
  • VSS.scree
  • scree
Examples
# NOT RUN {
scree(attitude)
#VSS.scree(cor(attitude)


# }
Documentation reproduced from package psych, version 1.8.12, License: GPL (>= 2)

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