[R] Unobserved heterogeneity

I need to read a data set that has multiple observations per person (like scanner panel data). I want to use optim and compute the objective function person by person where each person has multiple observations (as in latent class models a la Kamakura and Russell (JMR, 1989))? I tried to use the (

[R] Std. error of correlation coefficients

How do I get the std. errors of correlation coefficients? When I use the cor function it only prints the correlation. Thanks, Fusun. -- View this message in context: http://r.789695.n4.nabble.com/Std-error-of-correlation-coefficients-tp2320609p2320609.html Sent from the R help mailing list arch