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Installing RPy

For sophisticated plotting using the R package see Chapter 72.

Install python-rpy.

Older approaches did:

  $ wajig install rpy_0.3.1-1_i386.deb
  $ (cd /usr/lib; sudo ln -s R/bin/libR.so)

Then test it with:

  $ python
  Python 2.3.1 (#2, Sep 24 2003, 11:39:14)
  [GCC 3.3.2 20030908 (Debian prerelease)] on linux2
  Type "help", "copyright", "credits" or "license" for more information. 
  >>> from rpy import *
  >>> l = [r.dchisq(x, 4) for x in r.seq(0, 10, by=0.1)]
  >>> r.par(ask=1, ann=0)
  {'ask': 0, 'ann': 1}
  >>> r.plot(l, type='lines')
  Hit <Return> to see next plot:
  >>> r.dev_off()
  {'null device': 1}
  >>> ^D

To install it by hand until rpy debian package is released:

  $ cd /tmp
  $ wget http://easynews.dl.sourceforge.net/sourceforge/rpy/rpy-0.2.tar.gz
  $ tar zxvf rpy-0.2.tar.gz
  $ cd rpy-0.2
  $ sudo python setup.py install
  $ sudo emacs -nw /etc/ld.so.conf
  Add the line:
  /usr/lib/R/bin
  $ sudo ldconfig
  $ python
  Python 2.2.1 (#2, Sep  7 2002, 15:35:22) 
  [GCC 2.95.4 20011002 (Debian prerelease)] on linux2
  Type "help", "copyright", "credits" or "license" for more information. 
  >>> from rpy import *
  >>> l = [r.dchisq(x, 4) for x in r.seq(0, 10, by=0.1)]
  >>> r.par(ask=1, ann=0)
  >>> r.plot(l, type='lines')
  >>> ^D
  $ cd .. 
  $ sudo rm -rf rpy-0.2*

For earlier versions of rpy I used to get:

  $ python
  >>> from rpy imprt *
  Traceback (most recent call last):
    File "<stdin>", line 1, in ? 
    File "rpy.py", line 24, in ? 
      import _rpy
  ImportError: /usr/lib/atlas/libblas.so.2: undefined symbol: e_wsfe
  >>>

then you needed to remove atlas2-base:

  $ wajig remove atlas2-base

However, more recently this packages is actually required to run R and rpy!

With version 0.3.1 of rpy I get the following (11 Aug 03):

  $ python2.2
  Python 2.2.3+ (#1, Aug 10 2003, 10:11:23) 
  [GCC 3.3.1 (Debian)] on linux2
  Type "help", "copyright", "credits" or "license" for more information. 
  >>> import rpy
  Traceback (most recent call last):
    File "<stdin>", line 1, in ? 
    File "/usr/lib/python2.2/site-packages/rpy.py", line 24, in ? 
      import _rpy
  ImportError: /usr/lib/python2.2/site-packages/_rpymodule.so: 
      undefined symbol: jump_now
  >>>

Also happens for python2.3 (11 Aug 2003).