Comments on: Python and Geography: Input Output Models and Graph Theory http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/ intersecting space and time through gis endeavors Tue, 08 Feb 2011 01:03:54 +0000 hourly 1 http://wordpress.org/?v=3.0.3 By: Vishal http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-9125 Vishal Tue, 08 Feb 2011 01:03:54 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-9125 MIchalis, This is great. I'm wondering if you could share the Python code for this? FYI I'm just getting into Python for these sorts of applications. Thanks! MIchalis,
This is great. I’m wondering if you could share the Python code for this? FYI I’m just getting into Python for these sorts of applications. Thanks!

]]> By: kumar http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-6465 kumar Thu, 11 Nov 2010 05:00:10 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-6465 my mail id is srisrianand@gmail.com please reply me in mail also if possible... my mail id is srisrianand@gmail.com please reply me in mail also if possible…

]]> By: kumar http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-6464 kumar Thu, 11 Nov 2010 04:59:05 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-6464 I am a graph theory student i want to generate graphs like completed graphs, complete bipartite graphs and etc... by using python... is it possible... can any one help me out of it? I am a graph theory student i want to generate graphs like completed graphs, complete bipartite graphs and etc… by using python… is it possible… can
any one help me out of it?

]]> By: Ruslan http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-929 Ruslan Tue, 27 Apr 2010 01:14:03 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-929 Hi Michalis, I just came across your blog today from a review in GIS Development magazine. This is really a fantastic & resourceful blog. You surely have contributed a lot to the GIS community. Regards Ruslan Hi Michalis,

I just came across your blog today from a review in GIS Development magazine. This is really a fantastic & resourceful blog. You surely have contributed a lot to the GIS community.

Regards
Ruslan

]]> By: Michalis Avraam http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-867 Michalis Avraam Thu, 15 Apr 2010 01:07:23 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-867 MO, This should be possible in multiple methods. Are your data in an Excel sheet already? Then using xlrd to read them would be the way to go. As for the adjacency matrix calculation... I assume you have 45,000 nodes. I believe NetworkX can handle this. It also allows you to export a network graph to a numpy matrix populated with adjacency values. Which is very very good indeed, so you can avoid any calculations. If you want to contact me personally, maybe I can help with your code as well. Michalis MO,

This should be possible in multiple methods. Are your data in an Excel sheet already? Then using xlrd to read them would be the way to go. As for the adjacency matrix calculation… I assume you have 45,000 nodes. I believe NetworkX can handle this. It also allows you to export a network graph to a numpy matrix populated with adjacency values. Which is very very good indeed, so you can avoid any calculations.

If you want to contact me personally, maybe I can help with your code as well.

Michalis

]]> By: MO http://michalisavraam.org/2009/05/python-and-geography-input-output-models-and-graph-theory/comment-page-1/#comment-860 MO Wed, 14 Apr 2010 02:35:15 +0000 http://michalisavraam.org/blog/38-blog-entries/54-geopy-graph#comment-860 I have a data set of almost 45000 lines and i want to read it from excel worksheet to python and then want to compute the adjacency matrix. as i have tried this in Matlab and i failed because of the memory issues with Matlab. is it possible in Python. I have a data set of almost 45000 lines and i want to read it from excel worksheet to python and then want to compute the adjacency matrix. as i have tried this in Matlab and i failed because of the memory issues with Matlab. is it possible in Python.

]]>