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R-bloggers founder Tal Galili --Creating beautiful trees of clusterings with R

Brief Information:

R community well known, R-bloggers founder, Tal Galili, will show you a few programming skills from Creating beautiful trees of clusterings to updating R.

This event is co-organized with New York R users group: and both group will handle registration. If you are members of both groups, make sure you only sign up once. Thank you!

08/29/2013 Update:

Squarespace will generously sponsor us their office space for this event. The event is held at 459 Broadway(across Grand Street), New York, NY 10013.  It is on Floor 5.There's an elevator entrance around the corner on Grand street. Special Thanks go to Joel Witten and his colleagues!

Speaker Bio:

Mr. Tal Galili is an applied statistician and an enthusiastic R user. He holds a masters degree in biostatistics and is a lecturer for statistics courses at Tel Aviv University, while working on his PhD in statistics there. Tal writes the blog, and is the founder of a central hub (aggregator) of content collected from bloggers who write about R.


If you wish to play with the code a bit during the talk, you are invited to come with your laptops - have R installed (if you don't have an IDE yet - RStudio is great), and run the following sequence prior to the talk:

if (!require('installr'))  install.packages('installr'); require('installr');

## install.Rtools() # run this if you are using Windows and don't have Rtools


install_github('dendextend', 'talgalili')


install_github('dendextendRcpp', 'talgalili')

The code of the dendextend talk will here, for you to follow along:


7:00-8:30pm   Tal Galili will give the talk

8:30-9:00pm    Q & A


There will be a combination of four talks:

1) A biostatistical talk about "deciphering the tRNA code" - an interesting case study of using R for reaching an interesting discovery about the way the basic tRNA molecule is taking part in the centeral dogma of molecular biology. This talk will involve a combination of CART, cross-validation, heirarchical clusterings - and many figures. (this talk was recently given in useR 2013 and before then in useR 2010)

2) Introducing the "installr" package - for updating R, installing software with it, analyzing log files of R packages downloads, and some other minor tasks in R. This is an extended version of the talk recently given in useR 2013.

3) The recent work on the package "dendextend" (and dendextendRcpp) - intended for visualizing and comparing trees of heirarchical clusterings (a.k.a: dendrograms) with R.

There will be a tutorial which will go through a short overview of heirarchical clustering, "hclust" and "dendrogram" objects in R and then introduce the new abilities of manipulating trees using the "dendextend" package. From this talk you will know how to create, change, visualize, and statistically compare two trees of heirarchical clusterings (with some sprinkles of Rcpp).

4) (As time permits), some words about blogging about R. (Yes, it is about my favorite website: )






Join or login to comment.

  • A former member
    A former member

    Thank you to Joel Witten for hosting the space at SquareSpace! Thank you to Vivian for her awesome organization and dedication! Thank you to Tal Galili for the insightful and entertaining talk. Thank you to Tal's Wife, Deborah, for sharing her husband with the world and letting him stay so late. Great Event!

    2 · September 3, 2013

  • TASS G.

    it was fun

    September 3, 2013

  • Shangxuan Vivian Z.

    I would appreciate you to rate this event on and give more feedback on It was great to host you tonight.

    September 3, 2013

  • Angus Vincent W.

    Interesting topics and graphs

    September 2, 2013

  • Joel w.

    Think you cam ea bit too early, people are arriving now

    September 2, 2013

  • A former member
    A former member

    I can't get into the building

    September 2, 2013

  • Stephen S.

    I am not able to access the github link (or the github commands). Any suggestions?

    September 2, 2013

  • David C.

    Great topic. Venue ? Business offices might be closed for Labor Day holiday.

    August 26, 2013

  • Shangxuan Vivian Z.

    It is really hard to find space on labor day night. Could anyone help with the space? Any school, any private space will be fine. We expect to see 30 people come to this event. Thank you very much!

    August 28, 2013

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