[R] adding labels to x,y points
bps0002 at auburn.edu
Wed Sep 21 17:19:57 CEST 2011
#This should work (again, without your data ??)
with(colon[1:20,], plot(norm1, norm2, type='n',xlab='x norm1 sample',ylab='y
norm2 sample',main='Norm1 vs Norm2 - 20 genes'))
with(colon, text(norm1, norm2, label = row.names(colon[1:20,]))
> I am new to R.
> I have a matrix that I have assigned to the object “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
> I have plotted the first 20 values from two of the columns(samples).
>> plot(x,y,type='n',xlab='x norm1 sample',ylab='y norm2 sample',main='Norm1
>> vs Norm2 - 20
> 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
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