[R] contourplot lines, text, and mtext

of abline(0,1) on the plot. ltext(), on the other hand, seems to like to place text in the upper left corner of the plot. I suspect that I misunderstand the coordinate system that lattice uses for contour plots. Can anyone enlighten me? Richard -- Richard D. Morey, M.A. Research Assistant

[R] half-logit and glm (again)

I know this has been dealt with before on this list, but the previous messages lacked detail, and I haven't figured it out yet. The model is: \x_{ij} = \mu + \alpha_i + \beta_j \alpha is a random effect (subjects), and \beta is a fixed effect (condition). I have a link function: p_{ij} = .5

[R] error code 5 from Lapack routine 'dsyevr'

; there are slight deviations from symmetry (the largest is 3e-18). I have this in an MCMC loop, and it happens about once in every 40 iterations or so. What does this error mean? Thanks. -- Richard D. Morey, M.A. Research Assistant, Perception and Cognition Lab University of Missouri-Columbia