Re: [igraph] igraph visualization

[Tamás Nepusz]

At least we can be fairly sure now that Cairo is installed properly because igraph actually started plotting something and the error message you see was thrown by the graph drawer routine.

Could it be the case that your graph has no vertices at all?

T. 

On 11 Nov 2013, at 05:00, Ahmed Abdeen Hamed <address@hidden> wrote:

I removed all python versions and cairo and installed everything again using Homebrew

Still getting errors:

>>> plot(g, layout = layout)

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/Library/Python/2.7/site-packages/igraph/drawing/__init__.py", line 437, in plot

    result.show()

  File "/Library/Python/2.7/site-packages/igraph/drawing/__init__.py", line 321, in show

    self.redraw(ctx)

  File "/Library/Python/2.7/site-packages/igraph/drawing/__init__.py", line 274, in redraw

    plotter(ctx, bbox, palette, *args, **kwds)

  File "/Library/Python/2.7/site-packages/igraph/__init__.py", line 2942, in __plot__

    drawer.draw(self, palette, *args, **kwds)

  File "/Library/Python/2.7/site-packages/igraph/drawing/graph.py", line 175, in draw

    layout.fit_into(bbox, keep_aspect_ratio=False)

  File "/Library/Python/2.7/site-packages/igraph/layout.py", line 413, in fit_into

    mins, maxs = self.boundaries()

  File "/Library/Python/2.7/site-packages/igraph/layout.py", line 333, in boundaries

    mins.append(min(col)-border)

ValueError: min() arg is an empty sequence

>>> 

Does this look like something you are familiar with?

Thanks!

-Ahmed

On Sun, Nov 10, 2013 at 7:56 PM, Ahmed Abdeen Hamed <address@hidden> wrote:

I am still unable get it to work even though I tried both advice:

The path is: 

PYTHONPATH=/usr/local/lib/python2.7/site-packages

When I try which python is still get the following, which is not the path for the brew

/usr/bin/python

Here is what I have in my .bash_login

PATH="${PATH}:/Users/ahamed/bin:/opt/local/bin:/usr/local/lib/python2.7"

export PATH="${PATH}:/Users/ahamed/bin:/opt/local/bin" 

# Setting PATH for EPD_free-7.3-2

# The orginal version is saved in .bash_login.pysave

export PATH=$PATH:/Applications/InfiniteGraph/3.1/bin

export PYTHONPATH=/usr/local/lib/python2.7/site-packages

export ECLIPSE_HOME=/Applications/eclipse/

export PATH=$PATH:$ECLIPSE_HOME:$PYTHONPATH

##

# Your previous /Users/ahamedCOM/.bash_login file was backed up as /Users/ahamedCOM/.bash_login.macports-saved_2013-11-08_at_22:21:22

##

Is there anything fishy here?

-Ahmed

On Sun, Nov 10, 2013 at 1:25 PM, Tamás Nepusz <address@hidden> wrote:

FWIW, I managed to run “brew install py2cairo” without having to install a brew-based Python. I simply added “/usr/local/lib/python2.7/site-packages” on my Python path and it imports the cairo module just fine.

This seems to be confirmed by Homebrew’s wiki:

“If you have a brewed python, then the bindings are installed for that one. But if you don't have a brewed Python, Homebrew basically just uses the first python (and python-config) in your PATH. Check that by which python.”

https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python#homebrew-provided-python-bindings

So, basically, I think you simply have to add /usr/local/lib/python2.7/site-packages to your PYTHONPATH and you should be fine.

— 

T.