[R] Plot Principal component analysis

[David Winsemius]

SNN <s.nancy1 at yahoo.com> wrote in news:15717669.post at talk.nabble.com:

> 
> Thanks for your help,
>  Can R plot the data in 3 dimention, with different colors for each
>  group ? 
> for exmple I would like to have the plot with respect to PC1, PC2
> and PC3. 
> 

See if these answer your desires: 

<http://www.jstatsoft.org/v08/i11/paper>
<http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=44>

-- 
David Winsemius

> SNN wrote:
>> 
>> Hi,
>> 
>> I have matrix of 300,000*115 (snps*individual). I ran the PCA on
>> the covariance matrix which has a dimention oof 115*115. I have the
>> first 100 individuals from group A and the rest of 15 individuals
>> from group B. I need to plot the data in two and 3 dimentions with
>> respect to PC1 and PC2 and (in 3D with respect to PC1, PC2 and
>> PC3). I do not know how to have the plot ploting the first 100
>> points corresponding to group A in red (for example) and the rest
>> of the 15 points in Blue? i.e I want the each group in a diffrent
>> color in the same plot. I appreciate if someone can help. 
>> 
>> Thanks,
>> 
>