On Mon, Oct 19, 2009 at 1:58 AM, Peter Ehlers <ehl...@ucalgary.ca> wrote:
>
> Peng Yu wrote:
>>
>> Please see below that [3,1] of loadings is not printed. I am wondering
>> what the problem is?
>
> Not trying ?loadings, perhaps??
'loadings' gives me the same thing.
> pca_result$loadings
Loadings:
Comp.1 Comp.2 Comp.3 Comp.4
[1,] 0.556 0.378 -0.467 -0.574
[2,] -0.511 0.266 -0.761 0.299
[3,] -0.887 -0.425 -0.169
[4,] -0.651 0.152 -0.744
Comp.1 Comp.2 Comp.3 Comp.4
SS loadings 1.00 1.00 1.00 1.00
Proportion Var 0.25 0.25 0.25 0.25
Cumulative Var 0.25 0.50 0.75 1.00
> loadings(pca_result)
Loadings:
Comp.1 Comp.2 Comp.3 Comp.4
[1,] 0.556 0.378 -0.467 -0.574
[2,] -0.511 0.266 -0.761 0.299
[3,] -0.887 -0.425 -0.169
[4,] -0.651 0.152 -0.744
>>> set.seed(0)
>>> m=10
>>> n=4
>>> X=replicate(n,rnorm(m))
>>> pca_result=princomp(X)
>>> svd_result=svd(apply(X,2,function(x){x-mean(x)}))
>>> pca_result$loadings
>>
>> Loadings:
>> Comp.1 Comp.2 Comp.3 Comp.4
>> [1,] 0.867 0.306 -0.281 -0.275
>> [2,] -0.215 0.532 -0.614 0.541
>> [3,] -0.682 -0.713 -0.155
>> [4,] -0.448 0.397 -0.186 -0.780
>>
>> 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
>>>
>>> svd_result$v
>>
>> [,1] [,2] [,3] [,4]
>> [1,] -0.86704537 -0.3060826 0.2810007 -0.2749261
>> [2,] 0.21540928 -0.5321956 0.6144209 0.5411595
>> [3,] 0.03936291 0.6823365 0.7134127 -0.1546279
>> [4,] 0.44752846 -0.3968605 0.1859243 -0.7795205
>>
>> ______________________________________________
>> 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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