Dear R-friends, For the following data:> xyx y i 1 731 0.313 2 2 739 0.340 2 3 790 0.373 2 4 855 0.451 2 5 980 0.608 2 6 575 0.156 1 7 608 0.207 1 8 630 0.249 1 9 670 0.332 1 10 838 0.377 1 11 964 0.466 1> coplot(y ~ x|i, data=xy)coplot gives 3 panels, rather than 2, namely one for i=1 and one for i=2. Futhermore, when I extand data fram xy to have i=3 as follows:> xyx y i 1 334 0.129 3 2 365 0.198 3 3 411 0.223 3 4 731 0.313 2 5 739 0.340 2 6 790 0.373 2 7 855 0.451 2 8 980 0.608 2 9 575 0.156 1 10 608 0.207 1 11 630 0.249 1 12 670 0.332 1 13 838 0.377 1 14 964 0.466 1> coplot(y ~ x | i, data=xy)gives 4 panels, rather than 3. Is this appropriate (with default settings of coplot)? Best regards, C. Joseph Lu Department of Statistics National Cheng-Kung University Tainan, Taiwan -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
C. Joseph Lu <cjlu at ibm.stat.ncku.edu.tw> writes:>Dear R-friends, > >For the following data: > >> xy > x y i >1 731 0.313 2 >2 739 0.340 2 >3 790 0.373 2 >4 855 0.451 2 >5 980 0.608 2 >6 575 0.156 1 >7 608 0.207 1 >8 630 0.249 1 >9 670 0.332 1 >10 838 0.377 1 >11 964 0.466 1 > >> coplot(y ~ x|i, data=xy) >coplot gives 3 panels, rather than 2, namely one for i=1 and one for >i=2. > >Futhermore, when I extand data fram xy to have i=3 as follows: > >> xy > x y i >1 334 0.129 3 >2 365 0.198 3 >3 411 0.223 3 >4 731 0.313 2 >5 739 0.340 2 >6 790 0.373 2 >7 855 0.451 2 >8 980 0.608 2 >9 575 0.156 1 >10 608 0.207 1 >11 630 0.249 1 >12 670 0.332 1 >13 838 0.377 1 >14 964 0.466 1 > >> coplot(y ~ x | i, data=xy) >gives 4 panels, rather than 3. > >Is this appropriate (with default settings of coplot)?Specify i as a factor, e.g. coplot(y ~ x | factor(i), data=xy) It seems to me that the default behaviour is correct as it does not automatically coerce the conditioning variable to a factor. I must admit that I often want this so I have written a separate function that does that for me. Mark -- Mark Myatt -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._