Hi,

You may want to spend more time with an introduction to Python: being comfortable with Python programming is a requirement to use rpy (and rpy2). Then, the documentation for rpy and rpy2 is reasonably complete (at least it answers your question).

In the meantime, I think that the dollar sign is only accepted within string delimiters (' or "", or """, or '''') in Python.
The following should get you what you wish should:
with rpy: tmp['mids']
with rpy2: tmp.rx2('mids')

L.



On 2012-05-23 19:27, Shyam Saladi wrote:
Hi,

I am creating a histogram and would like to center the labels. I normally do this in R by the following:

# x has my data set
tmp <- hist(x, breaks=0:(max(x)+1), xaxt="n", right=FALSE, freq=FALSE)

axis(1, at=tmp$mids, labels=0:max(x))

In python, tmp$mids gives an error presumably because the compiler doesn't know how to interpret it. How can I specify it correctly, say in the following commands?


# lengthsR has my data set
tmp = r.hist(lengthsR, breaks = xvals, main = infile, xlab = "deltaG", labels = r.T, xaxt='n') #, probability = r.T

r.axis(1, at=tmp$mids, xvals)

Thanks a lot in advance,
Shyam

--
Lab of William Clemons
California Institute of Technology


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