Similarity Among Hurriyet and Zaman Columnists

The  following graph (dendrogram) groups similar authors together. Similarity is calculated based on letter frequency differences. Authors that are connected with shorter lines (horizontal lengths only) are more similar.




We can group the columnists into 5 large groups.

Group 1                   Group 2
- Nevin Halici            - Ahmet Cakir
- A. Rasim Kucukusta      - A. Ali Ural
- Erkan Celebi            - Yonca Tokbas
- Selim Isiklar           - Ayse Aral
- M. Ali Yildirimturk     - Selim Ileri
- Saruhan Ozel            - Ali Colak
- Zeki Col                - Ayse Arman
- Ali Aydin               - Nazan Bekiroglu
- Suleyman Sargin         - Mustafa Ulusoy
- Ali Unal                - Hekimoglu Ismail
- Ahmet Yavuz             - Ahmet Selim
                          - Rauf Tamer
                          - Ozgur Bolat
                          - Aysegul D. Yelce
                          - Ahmed Sahin
                          - Nihat Hatipoglu
                          - Ahmet Kurucan

Group 3 consists of two large sub groups
Group 3A                 Group 3B
- Bejan Matur            - Ufuk Bozkir
- Sedat Ergin            - Ertugrul Ozkok
- Abdulhamit Bilici      - Mehmet Ali Birand
- Cengiz Candar          - Fatih Cekirge
- Mehmet Kamis           - Rahmi Turan
- Gila Benmayor          - Kanat Atkaya
- Dogan Hizlan           - Ahmet Hakan
- Fehmi Koru             - Taha Kivanc
- Ferai Tinc             - Leyla Ipekci
- Sahin Alpay            - Mehmet Y. Yilmaz
- Joost Lagendijk        - Ismet Berkan
- Murat Yulek            - M. Nedim Hazar
- Ali H. Aslan
- Ibrahim Ozturk
- Ege Cansen
- Hamdullah Ozturk
- Huseyin Gulerce
- Ozdemir Ince
- Gunseli O. Ocakoglu
- Yalcin Bayer
- Ekrem Dumanli
- Bulent Korucu

Group 4                  Group 5
- Ihsan Dagi             - Kadir Dikbas
- Taha Akyol             - Yalcin Dogan
- Hadi Uluengin          - Erdal Saglam
- Nuriye Akman           - Mustafa Unal
- Melih Arat             - Sukru Kucuksahin
- Hilmi Yavuz            - Fikret Ertan
- Ali Bulac              - Osman Muftuoglu
- Mumtaz'er Turkone      - Sukru Kizilot
- Etyen Mahcupyan        - Ertan Acar
- Abdullah Aymaz         - Yilmaz Ozdil
- A. Turan Alkan         - Noyan Dogan
- Iskender Pala          - Okay Karacan
- Mustafa Armagan        - Vahap Munyar
- Soner Yalcin           - Atif Kececi
- Mehmed Niyazi
- Kerim Balci
- Besir Ayvazoglu

- The dendrogram is calculated using letter frequency differences between authors.
- I used Ward's method to calculate the dendrogram. Ward's method generates compact spherical clusters and minimizes variance.
- The data includes columnists from Hurriyet (marked in red) and Zaman newspapers for the year 2011. It does not include columnists who published less than 100000 character in that year.