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Re: st: Adjacency matrix in Stata
From
jean-luc morin-chesnel <[email protected]>
To
[email protected]
Subject
Re: st: Adjacency matrix in Stata
Date
Sun, 30 Mar 2014 19:46:33 +0200
Thank you very much, Stas!
Maybe I can reduce my dataset to, lets say 5k individuals?
What would you do? Do you have other alternatives in mind?
Thanks!
JL
On 30 March 2014 19:34, Stas Kolenikov <[email protected]> wrote:
> It would be cumbersome whichever way you want to look at it. And at
> any rate Stata won't be able to store a 100K x 100K matrix... only 11K
> x 11K matrices (see -help limits- and -set matsize-).
>
> -- Stas Kolenikov, PhD, PStat (ASA, SSC)
> -- Principal Survey Scientist, Abt SRBI
> -- Opinions stated in this email are mine only, and do not reflect the
> position of my employer
> -- http://stas.kolenikov.name
>
>
>
> On Sun, Mar 30, 2014 at 11:55 AM, jean-luc morin-chesnel
> <[email protected]> wrote:
>> Dear all,
>>
>> I have a panel dataset at the individual - day - product level
>> (unbalanced) and I would like to obtain a adjacency matrix in Stata,
>> but I do not know how to proceed.
>>
>> That is, I assume that 2 individuals are connected in the network if
>> they buy the same product the same day more than N times in my dataset
>> (lets say N=10).
>>
>> So I would like to obtain a matrix of adjacency in Stata: a MxM matrix
>> (M in the number of investors) where the coefficient mij=1 iff
>> investor i and investor j are connected in the network.
>>
>> I do not know how to proceed because I think that I should use loops,
>> but it seems to me that it is not very efficient to do so in Stata
>> (the dataset is large: 100k individuals). Any suggestion is very
>> welcomed.
>>
>> Many thanks,
>> Regards,
>>
>> JL
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