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...]^0.35 } y } ---------------------------------------------- Anyone can help me? Sincerely, =========================================== Dong H. Oh Ph. D Candidate Techno-Economics and Policy Program College of Engineering, Seoul National University, Seoul, 151-050, Republic of Korea E-mail:doriaba2 at snu.ac.kr Mobile: +82-10-6877-2109 Office : +82-2-880-9142 Fax: +82-2-880-8389

...in php exists in R. Looking forward to hearing from you. Best, ========================================================= Center of Excellence for Science and Innovation Studies, Royal Institute of Technology Drottning Kristinas v?g 30 100 44 Stockholm, Sweden e-mail: donghoh at infra.kth.se, doriaba2 at snu.ac.kr, oh.dongh at gmail.com Office: +46 8 790 67 93 Fax: +46 8 790 95 17 Cell phone: +46 73 563 45 22 =========================================================

...)? I think indexing help database is one of the solution, but i don't know how to do. Best, Dong-hyun Oh ========================================================= Center of Excellence for Science and Innovation Studies, Royal Institute of Technology, Sweden e-mail: donghoh at infra.kth.se, doriaba2 at snu.ac.kr, oh.dongh at gmail.com cell phone: +46 73 563 45 22

how to realize the following SQL command in R? select distinct A, B, count(C) from TABLE group by A, B ; quit; Best Regards --------------------------------- Sponsored Link Get a free Motorola Razr! Today Only! Choose Cingular, Sprint, Verizon, Alltel, or T-Mobile. [[alternative HTML version deleted]]