[R] adding labels to x,y points

[B77S]

Actually, you appear to have re-assigned your object “colon” (from
"c:\\alon.txt") with a character vector of intended row.names.

so use 

row.names(colon) <-paste("g",c(1:nrow(colon)),sep="")




B77S wrote:
> 
> I don't have access to your "alon.txt" file (see ?dput for future posts),
> but...
> 
> I'm pretty sure the info you want is not in row.names(colon[1:2])
> 
> should just be using:
> 
> text(x,y, label = colon[1:20,])  
> 
> ??
> 
> HTH
> 
> 
> 
> baumeist wrote:
>> 
>> Hi,
>> I am new to R.
>> 
>> I have a matrix that I have assigned to the object “colon”.
>> 
>>> colon<-read.table("c:\\alon.txt",header=T,row.names=1)
>> 
>> attach(colon)
>> names(colon)
>> 
>> The dimenstions are 2000   62.
>> 
>> Each of the 62 columns (titled norm1, norm2, norm3, etc) has 2000
>> different numbers (‘continuous’ values) within it.
>> 
>> I have also assigned a name for each of the 2000 rows of the dataframe
>> with a prefix (i.e. g1 …. g2000) using the code (not sure if I did this
>> right):
>> 
>>> colon<-paste("g",c(1:nrow(colon)),sep="")
>> 
>> I have plotted the first 20 values from two of the columns(samples).
>> 
>>> x<-c(norm1[1:20])
>> 
>>> y<-c(norm2[1:20])
>> 
>>> plot(x,y,type='n',xlab='x norm1 sample',ylab='y norm2
>>> sample',main='Norm1 vs Norm2 - 20
>> genes')
>> 
>>> points(x,y,pch=15,col='blue')
>> 
>> Now I wish to assign labels to each point (above each point (i.e. pos=3)
>> in the plot with “g1 to g20 corresponding to each row but I am having
>> trouble with this step.
>> 
>> I have tried:
>> 
>>> text(x,y, label = row.names(colon[1:20])) 
>> 
>> but nothing happens. 
>> 
>> Any suggestions?
>> 
>> Thanks in advance
>> MAB
>> 
> 


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