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*Hi all, I know this is probably basic, but I have proven to be a slow learner in any programming language. Anyhow, how can I calculate the SD for each person in my table? I have two patients in this R data.frame, 7200 and 23955. I extracted this from a relational database, but am I better off attempting to compute SD in SQL, or is this easily accomplished in R? * SUBJECT_ID HR 1 7200 158 2 7200 165 3 7200 138 4 7200 152 5 7200 139 6 7200 157 7 7200 186 8 23955...

...ps_2.1-6.tar.gz' Content type 'application/x-gzip' length 1371854 bytes (1.3 Mb) opened URL ================================================== downloaded 1.3 Mb trying URL 'http://cran.case.edu/src/contrib/mapproj_1.1-8.3.tar.gz' Content type 'application/x-gzip' length 23955 bytes (23 Kb) opened URL ================================================== downloaded 23 Kb * installing *source* package ‘maps’ ... ** libs ** arch - gcc -std=gnu99 -O3 -pipe -g Gmake.c -o Gmake Gmake.c: In function ‘get_lh’: Gmake.c:111: warning: cast from pointer to integer of different...

... pretty obvious, isn''t it? Because you end up with a Request model and hence @request instance variables - and there you go: marvellous clash with the controller environment that is established in instance variables ... such as @request. After renaming my model to ''Inquiry'' everything just worked fine. Stupid as I am, that insight took me some time to figure out, so

...red") + I have solved this, but in (what I assume is) a really bad way involving for loops. There must be a better way to get form the first data frame above to the second! Cheers, Till -- Till Bayer 4700 King Abdullah University for Science and Technology Building 2, Room 2227 Thuwal 23955-6900 Saudi Arabia Phone: +96628082373

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