Description Usage Arguments Details Author(s) References See Also Examples
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.
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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? |
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
William Revelle
http://personality-project.org/r/vss.html
fa.parallel
VSS.plot
, ICLUST
, omega
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