[R] What an element in loading is missing? (princomp)

[Peter Ehlers]

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??

  -Peter Ehlers

> 
>> 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
> 
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