[R] values for the scree plot (package psych)

[Blaser Nello]

The plot shows the variation for each component and mypc$sdev gives you the standard deviation. 
If you want to know the variation, use mypc$sdev^2.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Dimitri Liakhovitski
Sent: Donnerstag, 21. März 2013 12:26
To: r-help
Subject: [R] values for the scree plot (package psych)

Hello,

I am using function princomp from the package psych.
I have my principle component object mypc:

mypc <- princomp(covmat=mycor)

plot(mypc)  # shows me a screeplot

Question: how could I actually see the values displayed in the screeplot. I don't mean on the graph - I just want to know the actual value for each component (e.g., 10, 3.2, 1.8, etc.)

I need to know how much variance, in total, a certain number of comonents explain.

Thanks a lot!



--
Dimitri Liakhovitski

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