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...r your second question, the correlation estimator is a continuous function of each of the individual data points, so perturbing the values of any of them by a sufficiently small amount will only perturb the correlation by a small amount. > -----Original Message----- > From: dechao wang [SMTP:dechwang at yahoo.co.uk] > Sent: Thursday, March 07, 2002 5:34 AM > To: r-help at stat.math.ethz.ch > Subject: [R] linear correlation? > > Hi, I have checked statistic textbooks about > correlations, but I am still not sure the correlation > analysis with different units, for example,...

Hi, can you advise me is there any ROC(Receiver Operating Characteristic)analysis program in R? Thanks, Dechao ===== Dechao Wang Tel: (44) 01223 719718 Mob: (44) 07729 411134 __________________________________________________ Everything you'll ever need on one web page from News and Sport to Email and Music Charts

Dear statistitians / R users, I was told to analyse the effects of the four factors using lm or update for aov. The following is the result from lm. As you can see that in the last few lines enclosed coefficients. 1)Does this mean I can write a formula, like yield =0.26 + 0.03*H + 1.48*T + 0.04*L + 0.004*C 2) in the two levels design, is there any difference between I use (-1, 1) to