Dear group, A data matrix when plotted as a line plot, I see several patterns. For example, how my students performed for different courses they took this academic year. I need to find out a pattern divided into three categories... say excellent, mediocral and worst. How can I be able to fix a threshold and seperate the patterns into these 3 categories. The question being asked is: I want to pick those students who are exceptionally good in a course and exceptionally bad in a course (here 2 bins) and third category being, for a given course i did not see any students who performed either good or bad (pretty much a straight line or all students behave the same way). my question is Can I do this in R. If so, would you please suggest some good tutorials, considering the fact that i am not a statistician. The arbitarary matrix is: a,b,c,d - On X-axis Stu. 1 - 5 : on Y-axis, Stu1 stu2 stu3 stu4 stu5 a 1 2 7 3 2 b 2 2 3 2 3 c 2 1 2 3 2 d 1 2 6 2 1 Thanks P.
A small correction: a,b,c,d - On X-axis course points : on Y-axis for all students. 2. I do not know if this can be called pattern recognition. What i mean is the line patterns in the line graph. P --- S Peri <biocperi at yahoo.com> wrote:> Dear group, > > A data matrix when plotted as a line plot, I see > several > patterns. For example, how my students performed for > different courses they took this academic year. I > need > to find out a pattern divided into three > categories... > say excellent, mediocral and worst. How can I be > able > to fix a threshold and seperate the patterns into > these 3 categories. The question being asked is: > I want to pick those students who are exceptionally > good in a course and exceptionally bad in a course > (here 2 bins) and third category being, for a given > course i did not see any students who performed > either > good or bad (pretty much a straight line or all > students behave the same way). > > my question is Can I do this in R. If so, would you > please suggest some good tutorials, considering the > fact that i am not a statistician. > > The arbitarary matrix is: > a,b,c,d - On X-axis > Stu. 1 - 5 : on Y-axis, > > > Stu1 stu2 stu3 stu4 stu5 > a 1 2 7 3 2 > b 2 2 3 2 3 > c 2 1 2 3 2 > d 1 2 6 2 1 > > > Thanks > P. > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > R-project.org/posting-guide.html >