Josh B wrote:
Hello again,
I was hoping one of you could help me with this problem. Consider the
sample data from R:
summary(prcomp(USArrests))
Importance of components: PC1 PC2 PC3 PC4 Standard
deviation 83.732 14.2124 6.4894 2.48279 Proportion of Variance
0.966 0.0278 0.0058 0.00085 Cumulative Proportion 0.966 0.9933
0.9991 1.00000
How do I access the information contained within this summary? For
instance, let's say I wanted to make a graph based on the second row
("Proportion of Variance").
The easiest way is to use the ?str function to see how an object is put
together.
So, assign the results of the summary to a variable
x <- summary(prcomp(USArrests))
then
str(x)
will lead you to :
plot(x$importance[2, ], type = "l")
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