Re: [R] How to read Cumulative proportion in using princomp?

2011-03-16 Thread Martyn Byng 
Hi,

The values are calculated on the fly in the summary function

stats:::print.summary.princomp

using

vars - result$sdev^2
vars - vars/sum(vars)
cumsum(vars)


Martyn

-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of ian_zhangty
Sent: 16 March 2011 14:19
To: r-help@r-project.org
Subject: [R] How to read Cumulative proportion in using princomp?

Dear all, 

 result-summary(princomp(x,cor=TRUE))
result
Importance of components:
 Comp.1Comp.2 Comp.3 Comp.4
Standard deviation 1.642136 1.0114376 0.45146892 0.27669119
Proportion of Variance 0.674153 0.2557515 0.05095605 0.01913950
Cumulative Proportion  0.674153 0.9299044 0.98086050 1.

I want to read Cumlative Proportion listed above. But I cannot find it
in
result, instead, R gives me followed, which is not same with above: 
result[2]
$loadings

Loadings:
Comp.1 Comp.2 Comp.3 Comp.4
YC.T 0.183  0.935  0.250  0.172
YC.Rad   0.581 -0.130 -0.413  0.689
YC.Rain -0.537  0.308 -0.784   
YC.ETPM  0.583  0.119 -0.389 -0.703

   Comp.1 Comp.2 Comp.3 Comp.4
SS loadings  1.00   1.00   1.00   1.00
Proportion Var   0.25   0.25   0.25   0.25
Cumulative Var   0.25   0.50   0.75   1.00

I am wondering how can I calculate Cumulative Proportion in the first
result. 
Thank you very much

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Re: [R] How to read Cumulative proportion in using princomp?

2011-03-16 Thread Peter Ehlers 

On 2011-03-16 10:31, Martyn Byng wrote:

Hi,

The values are calculated on the fly in the summary function

stats:::print.summary.princomp

using

vars- result$sdev^2
vars- vars/sum(vars)
cumsum(vars)



Or you could use the prcomp summary function (maybe you
should use prcomp() for you model?):

stats:::summary.prcomp(result)$importance[3, ]

Use str() to inspect the components of the summary
function.

Peter Ehlers



Martyn

-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of ian_zhangty
Sent: 16 March 2011 14:19
To: r-help@r-project.org
Subject: [R] How to read Cumulative proportion in using princomp?

Dear all,


result-summary(princomp(x,cor=TRUE))
result

Importance of components:
  Comp.1Comp.2 Comp.3 Comp.4
Standard deviation 1.642136 1.0114376 0.45146892 0.27669119
Proportion of Variance 0.674153 0.2557515 0.05095605 0.01913950
Cumulative Proportion  0.674153 0.9299044 0.98086050 1.

I want to read Cumlative Proportion listed above. But I cannot find it
in
result, instead, R gives me followed, which is not same with above:

result[2]

$loadings

Loadings:
 Comp.1 Comp.2 Comp.3 Comp.4
YC.T 0.183  0.935  0.250  0.172
YC.Rad   0.581 -0.130 -0.413  0.689
YC.Rain -0.537  0.308 -0.784
YC.ETPM  0.583  0.119 -0.389 -0.703

Comp.1 Comp.2 Comp.3 Comp.4
SS loadings  1.00   1.00   1.00   1.00
Proportion Var   0.25   0.25   0.25   0.25
Cumulative Var   0.25   0.50   0.75   1.00

I am wondering how can I calculate Cumulative Proportion in the first
result.
Thank you very much

--
View this message in context:
http://r.789695.n4.nabble.com/How-to-read-Cumulative-proportion-in-using
-princomp-tp3381881p3381881.html
Sent from the R help mailing list archive at Nabble.com.

__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


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Re: [R] How to read Cumulative proportion in using princomp?

2011-03-16 Thread ian_zhangty 
THANK U VERY MUCH!!

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and provide commented, minimal, self-contained, reproducible code.