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The "sna" package in R and NetworkX library in Python probably have the most efficient and accessible ways to calculate but a steep learning curve. If you have windows and Office>=2007, I'd recommend the NodeXL package.

On Sep 18, 2011 11:38 PM, "kamal badar" <[log in to unmask]">[log in to unmask]> wrote:
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>
> Dear All,
>
> I want to calculate closeness centrality (sum of length of all paths) for 1,782 nodes. When I try to calculate with UCINET(latest version 6.289), it hangs. I even tried to leave the system for 1 full day and night but still it did not produced desired output. If some one can recommend some software which has an efficient algorithm to calculate the desired, I'll be really grateful.
>
> Thanks and Regards
> Kamal Badar
> Doctoral Student
> AIT, Thailand.    
>
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