R, twitteR and igraphJust-In Time Sociology @EPFL

Yannick Rochat1,2,3,Martin Grandjean2,3,Vincent Barbay3,4

1DHLab, EPFL,2 UNIL,3 Pegasus Data Project,4OZWE, Lausanne

December 4, 2012

Examples

Twitter

R & twitteR

Just-in time #JITSO12

Conclusion

Examples

ContentTweets containing hashtag #EnLD (= En Ligne Directe)

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Examples

Timestamp0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

sam 6 oct

ven 5 octRubik

jeu 4 octvente terrain

mer 3 octvaccins

mar 2 octMörgeli

lun 1 octalcool

dim 30 sep

sam 29 sep

ven 28 sep

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Examples

Predictions (?)

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Examples

Mentions (network)

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Examples

Twitter

R & twitteR

Just-in time #JITSO12

Conclusion

Twitter

Twitter 3rd-party appsA few examples. . .

• TweetBackup

• Tweet Archivist

• Topsy

• Yahoo pipes (RSS)• IFTTT.com

• i.e. online scripts that can send archives toevernote, dropbox, etc.

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Twitter

API

• API = Application Programming Interface

• dev.twitter.com• good coding skills needed

• REST API• Streaming API• OAuth• JSON

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Twitter

APIA sample of PHP code used by the Pegasus Data Project

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Twitter

APIJSON (output format)

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Examples

Twitter

R & twitteR

Just-in time #JITSO12

Conclusion

R & twitteR

Installhttp://r-project.org

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R & twitteR

As Quora says...

I R is a data analysis software.

I R is a programming language.

I R is an environment for statistical analysis.

I R is an open-source software project.

I R is a worldwide community of statisticians,

data analysts and data scientists.

http://www.quora.com/R-software/What-is-R/

answer/David-Smith-3114 / 29

R & twitteR

Strong community

I Developers

I Users

I Forums, mailing-lists

I #rstats

I quora, stackoverflow

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R & twitteR

InstalltwitteR

Installing is necessary only once.

Loading1 has to be done every session, or once for all via package options.

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R & twitteR

searchTwitter

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R & twitteR

searchTwitter

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R & twitteR

searchTwitter

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R & twitteR

searchTwitterMore generally. . .

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R & twitteR

list → data frames

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Examples

Twitter

R & twitteR

Just-in time #JITSO12

Conclusion

Just-in time #JITSO12

ContentWord cloud

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Just-in time #JITSO12

Timestamp

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Just-in time #JITSO12

NetworkWho mentions whom ?

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Just-in time #JITSO12

Others directions

I Cascades / trends / diffusion

I Text mining

I Dynamics

I Prediction

I Geolocation

I . . .

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Examples

Twitter

R & twitteR

Just-in time #JITSO12

Conclusion

Conclusion

References

I Csardi G, Nepusz T, The igraph software packagefor complex network research, InterJournal,Complex Systems 1695. 2006.http://igraph.sf.net

I Gentry J, twitteR: R based Twitter client. Rpackage version 0.99.19. 2012.http://CRAN.R-project.org/package=twitteR

I Grandjean M, Rochat Y, Barbay V, The PegasusData Project. 2012. http://pegasusdata.com

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