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How to plot two variables in the same qqnorm-plot?
2 messages · Jenny persson, Dimitris Rizopoulos
try this: z1 <- rnorm(100) z2 <- rt(100, 3) ########## q1 <- qqnorm(z1, plot.it = FALSE) q2 <- qqnorm(z2, plot.it = FALSE) plot(range(q1$x, q2$x), range(q1$y, q2$y), type = "n") points(q1) points(q2, col = "red", pch = 3) I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Jenny persson" <jenny197806 at yahoo.se> To: <r-help at stat.math.ethz.ch> Sent: Friday, December 08, 2006 11:30 AM Subject: [R] How to plot two variables in the same qqnorm-plot?
Dear all, I have two variables called c2 and c3 and want to plot these variables in the same qqnorm-plot with two different symbols or colors to distinguish them so I can easily compare the variables aginst each other. How can I do in R? I only manage to do two separated qqnorn-plots. Thanks for your help, All the best, Jenny c2= -0.1545775144 -0.0601161235 -0.1454710903 0.1893182564 -0.0470586789 -0.0740945381 -0.0041386301 0.0889232833 -0.0418779055 -0.0184595989 -0.1116784460 0.5286719173 -0.0714560939 -0.1160750488 0.2479689612 -0.0255424336 -0.1802256606 -0.1436590798 0.2091955894 -0.0408695231 -0.0097490458 0.4674886420 0.1310178029 0.2518403775 c3= -0.1696564482 -0.1126714841 -0.1460504793 0.1674967485 -0.0181011669 -0.0671367425 0.3261235871 0.0125372613 -0.0970306822 0.0066345879 -0.0438274488 0.8376670819 -0.1195411677 -0.0735540655 0.2999832105 -0.0133914650 -0.1020235781 -0.0929364933 0.1909337727 -0.0198168723 0.0544515704 0.5744399944 0.5022208978 -0.1494894501 --------------------------------- Stava r?tt! Stava l?tt! Yahoo! Mails stavkontroll tar hand om tryckfelen och mycket mer! F? den p? http://se.mail.yahoo.com [[alternative HTML version deleted]]
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