[R] Where are the PCA outputs?

[Charles Determan]

Hi Nick,

"prcomp" returns an object of class "prcomp" so when you simply 'print' the
object it gets passed to the "print.prcomp" function.  If you want to see
all the objects you should assign the results to an object.

Regards,
Charles

On Mon, Sep 12, 2016 at 7:56 AM, WRAY NICHOLAS <nicholas.wray at ntlworld.com>
wrote:

> Hi R Folk  I have been kicking some data around and one thing has been to
> try a
> PC analysis  on it, but whereas in the online examples I've looked at the
> prcomp
> function gives a set of five outputs when I use the prcomp function it only
> gives me a set of standard deviations and the rotation matrix
>
> My data (pcl) is this:
>
> resmat.3...2. resmat.3...3. resmat.3...4.
> 1     0.08749276   0.015706470         0.259
> 2     0.08749276   0.039266176         0.198
> 3     0.10630841   0.047119411         0.235
> 4     0.25307047   0.062825881         0.374
> 5     0.14393971   0.117798527         0.534
> 6     0.23049169   0.023559705         0.355
> 7     0.15052518   0.007853235         0.179
> 8     0.09784137   0.031412940         0.219
> 9     0.09878215   0.039266176         0.301
> 10    0.14111736   0.157064702         0.285
> 11    0.03951286   0.015706470         0.036
> 12    0.16181457   0.125651762         0.324
> 13    0.13359110   0.031412940         0.304
> 14    0.08278885   0.031412940         0.221
> 15    0.08561120   0.023559705         0.207
> 16    0.12042015   0.039266176         0.194
> 17    0.13359110   0.047119411         0.164
> 18    0.08937433   0.047119411         0.216
> 19    0.12700562   0.023559705         0.230
>
> the output is then
> > prcomp(pcl,scale.=T)
> Standard deviations:
> [1] 1.4049397 0.8447366 0.5590747
>
> Rotation:
> PC1         PC2        PC3
> resmat.3...2. 0.5599782 -0.64434772 -0.5208075
> resmat.3...3. 0.5229417  0.76245515 -0.3810434
> resmat.3...4. 0.6426168 -0.05897597  0.7639146
>
> Does anyone know why the other things are not appearing?
>
> Thanks, Nick
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>
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