[R] pairewise plots

[Petr Pikal]

Hallo

On 29 Mar 2005 at 6:58, Hai Lin wrote:

> Dear R users,
> 
> I have a data generated as the following,
> 
> dat <- data.frame(matrix(sample(24), nrow=4))
> dimnames(dat) <-list(rownames=c('g1','g2','g3','g4'),
> colnames=c("A_CH1","A_CH2","B_CH1","B_CH2","C_CH3","C_CH3"))
> 
> ť dat
>    A_CH1 A_CH2 B_CH1 B_CH2 C_CH3 C_CH3
> g1    16    24     7     9    14    20
> g2     4    10    19    22     5    17
> g3    11    18    21    12    13     1
> g4     2     3    15     6    23     8
> 
> I am trying to plot them pairwise by column(might extend to more than
> 3 pairs) Instead manually plotting as below, could you please point me
> out with easier ways? 
> 
> par(mfrow=c(3,1))

You can use for construction

for(i in c(1,3,5)) plot(dat[,i]+dat[,i+1], dat[,i]-dat[,i+1])

but if you want x or y labels formated differently, you probably 
need to ad some kind of expression in xlab (ylab) parameters.

Cheers
Petr



> plot(dat$A_CH1+dat$A_CH2, dat$A_CH1-dat$A_CH2)
> plot(dat$B_CH1+dat$B_CH2, dat$B_CH1-dat$B_CH2)
> plot(dat[,5]+dat[,6], dat[,5]-dat[,6])
> 
> Thanks a lot for your help
> 
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Petr Pikal
petr.pikal at precheza.cz