[R] Plotting Simple Slopes with Multilevel Categorical Moderator

[Richard M. Heiberger]

I think you are looking for analysis of covariance.
Try the ancova function in the HH package.

install.packages("HH")
library(HH)
?ancova
demo("ancova")

On Thu, Apr 10, 2014 at 10:48 AM, Patzelt, Edward <patzelt at g.harvard.edu> wrote:
> R -
>
> I've got a DV with 2 IVs one of which has 5 levels. I tried using the
> "pequod" package; however found that it is not able to graph/simple slope a
> moderator with multiple levels. Is there a package available to do this?
> (data below)
>
> dat$gpa <- as.factor(dat$gpa)
>
> mod1 <- lmres(item25 ~ psd * gpa, centered = c("psd", "gpa"), data = dat)
>
> sSlopes <- simpleSlope(mod1, pred = "psd", mod1 = "gpa")
>
> PlotSlope(sSlopes, namey = "Affirmative Action", namex = "Political
> Conservatism")
>
> structure(list(item25 = c(3L, 2L, 2L, 4L, 2L, 1L, 2L, 3L, 3L,
>
> 2L, 5L, 2L, 2L, 0L, 2L, 5L, 5L, 2L, 2L, 2L, 2L, 1L, 2L, 2L, 2L,
>
> 2L, 2L, 2L, 4L, 3L, 3L, 2L, 2L, 3L, 3L, 2L, 2L, 4L, 1L, 2L, 0L,
>
> 1L, 3L, 2L, 3L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 2L, 2L, 2L,
>
> 2L, 1L, 3L, 2L, 3L, 2L, 3L, 1L, 3L, 1L, 2L, 3L, 2L, 1L, 5L, 2L,
>
> 3L, 2L, 0L, 5L, 1L, 1L, 3L, 3L, 1L, 1L, 2L, 0L, 2L, 4L, 5L, 2L,
>
> 1L, 4L, 4L, 1L, 3L, 2L, 2L, 3L, 2L, 4L, 3L, 3L, 3L, 1L, 3L, 1L,
>
> 3L, 2L, 3L, 2L, 3L, 3L, 2L, 1L, 5L, 3L, 2L, 2L, 3L, 1L, 2L, 3L,
>
> 3L, 1L, 2L, 3L, 1L, 1L, 3L, 2L, 1L, 3L, 0L, 2L, 2L, 1L, 3L, 2L,
>
> 3L, 2L, 3L, 3L, 1L, 3L, 1L, 2L, 3L, 3L, 3L, 2L, 3L, 3L, 2L, 3L,
>
> 3L, 3L, 2L, 2L, 2L, 3L, 3L, 3L, 1L, 1L, 4L, 1L, 1L, 2L, 1L, 4L,
>
> 3L, 1L, 2L, 4L, 3L, 1L, 1L, 2L, 3L, 1L, 1L, 2L, 1L, 3L, 2L, 2L,
>
> 1L, 4L, 1L, 2L, 3L, 3L, 3L, 3L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 2L,
>
> 3L, 3L, 2L, 2L, 2L, 3L, 1L, 2L, 1L, 2L, 2L, 3L, 2L, 4L, 2L, 3L,
>
> 2L, 3L, 4L, 3L, 2L, 2L, 1L, 3L, 2L, 3L, 2L, 3L, 4L, 1L, 4L, 3L,
>
> 1L, 1L, 2L, 2L, 1L, 2L, 1L, 3L, 3L, 5L, 3L, 1L, 2L, 2L, 4L, 1L,
>
> 3L, 3L, 1L, 3L, 2L, 1L, 1L, 1L, 3L, 1L, 1L, 1L, 3L, 2L, 2L, 3L,
>
> 2L, 1L, 2L, 2L, 3L, 1L, 2L, 1L, 0L, 2L, 2L, 3L, 3L, 3L, 1L, 4L,
>
> 2L, 2L, 3L, 1L, 3L, 2L, 2L, 3L, 2L, 2L, 3L, 3L, 1L, 1L, 1L, 2L,
>
> 0L, 1L, 3L, 2L, 3L, 2L, 2L, 2L, 3L, 1L, 2L, 3L, 1L, 3L, 3L, 1L,
>
> 2L, 1L, 2L, 2L, 1L, 2L, 1L, 1L, 2L, 2L, 2L, 1L, 5L, 3L, 2L, 1L,
>
> 0L, 1L, 3L, 2L, 2L, 2L, 3L, 2L, 3L, 4L, 2L, 4L, 2L, 3L, 2L, 1L,
>
> 2L, 3L, 1L, 2L, 2L, 2L, 3L, 3L, 2L, 5L, 4L, 4L, 3L, 2L, 3L, 3L,
>
> 1L, 1L, 1L, 1L, 3L, 2L, 1L, 2L, 3L, 2L, 2L, 3L, 2L, 2L, 4L, 0L,
>
> 2L, 3L, 3L, 3L, 3L, 2L, 2L, 3L, 1L, 3L, 1L, 2L, 1L, 3L, 3L, 3L,
>
> 2L, 2L, 5L, 3L, 4L, 3L, 3L, 1L, 2L, 1L, 2L, 2L, 3L, 2L, 1L, 2L,
>
> 2L, 2L, 2L, 3L, 2L, 1L, 2L, 1L, 2L, 2L, 4L, 3L, 2L, 4L, 3L, 1L,
>
> 1L, 3L, 2L, 1L, 2L, 4L, 2L, 2L, 5L, 3L, 2L, 4L, 5L, 2L, 3L, 4L,
>
> 1L, 1L, 1L, 3L, 3L, 2L, 3L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
>
> 3L, 4L, 3L, 3L, 2L, 2L, 3L, 2L, 1L, 1L, 2L, 2L, 3L, 3L, 3L, 4L,
>
> 1L, 1L, 3L, 5L, 0L, 0L, 2L, 2L, 4L, 2L, 2L, 1L, 3L, 2L, 1L, 2L,
>
> 1L, 1L, 2L, 2L, 2L, 1L, 4L, 1L, 3L, 4L, 4L, 3L, 4L, 1L, 1L, 2L,
>
> 3L, 3L, 5L, 2L, 1L, 2L, 2L, 3L, 3L, 1L, 2L, 2L, 1L, 3L, 4L, 3L,
>
> 1L, 4L, 3L, 2L, 3L, 2L, 5L, 4L, 2L, 4L, 3L, 3L, 2L, 1L, 3L, 2L,
>
> 2L, 3L, 1L, 1L, 2L, 1L, 2L, 3L, 4L, 1L, 1L, 2L, 2L, 2L, 2L, 2L,
>
> 3L, 2L, 1L, 3L, 5L, 2L, 3L, 5L, 2L, 4L, 2L, 2L, 4L, 2L, 2L, 2L,
>
> 3L, 3L, 3L, 3L, 2L, 5L, 2L, 3L, 2L, 0L, 1L, 0L, 2L, 3L, 4L, 2L,
>
> 2L, 3L, 3L, 2L, 3L, 2L, 2L, 3L, 3L, 2L, 2L, 3L, 1L, 2L, 3L, 1L,
>
> 2L, 1L, 3L, 3L, 2L, 4L, 3L, 1L, 2L, 2L, 3L, 2L, 3L, 5L, 3L, 1L,
>
> 2L, 2L, 3L, 1L, 2L, 1L, 1L, 1L, 1L, 1L, 3L, 3L, 3L, 1L, 3L, 2L,
>
> 3L, 1L, 3L, 2L, 4L, 2L, 3L, 2L, 3L, 1L, 1L, 2L, 2L, 2L, 0L, 3L,
>
> 3L, 1L, 1L, 2L, 1L, 4L, 2L, 2L, 1L, 4L, 5L, 5L, 1L, 3L, 3L, 1L,
>
> 2L, 4L, 2L, 4L, 3L, 4L, 2L, 2L, 3L, 1L, 2L, 3L, 1L, 3L, 2L, 3L,
>
> 2L, 1L, 2L, 2L, 2L, 2L, 3L, 1L, 2L, 4L, 3L, 4L, 3L, 2L, 3L, 3L,
>
> 3L, 3L, 3L, 2L, 2L, 3L, 4L, 4L, 2L, 2L, 2L, 5L, 3L, 3L, 5L, 2L,
>
> 3L, 2L, 1L, 1L, 4L, 2L, 2L, 2L, 1L, 4L, 0L, 2L, 3L, 1L, 3L, 3L,
>
> 2L, 3L, 2L, 3L, 1L, 2L, 1L, 4L, 2L, 2L, 4L, 3L, 3L, 2L, 3L, 3L,
>
> 2L, 4L, 3L, 2L, 2L, 3L, 1L, 2L, 2L, 2L, 2L, 4L, 4L, 3L, 2L, 3L,
>
> 5L, 3L, 1L, 2L, 2L, 3L, 3L, 1L, 2L, 3L, 3L, 3L, 1L, 1L, 1L, 2L,
>
> 2L, 3L, 1L, 1L, 3L, 1L, 1L, 2L, 1L, 2L, 1L, 1L, 2L, 2L, 3L, 3L,
>
> 1L, 3L, 2L, 1L, 1L, 2L, 3L, 2L, 2L, 1L, 4L, 2L, 3L, 2L, 2L, 0L,
>
> 2L, 1L, 1L, 2L, 2L, 1L, 1L, 1L, 2L, 2L, 3L, 4L, 2L, 2L, 1L, 3L,
>
> 3L, 4L, 3L, 3L, 2L, 2L, 2L, 1L, 1L, 5L, 3L, 4L, 2L, 2L, 2L, 2L,
>
> 3L, 3L, 2L, 3L, 3L, 3L, 4L, 2L, 3L, 2L, 3L, 1L, 3L, 2L, 2L, 2L,
>
> 2L, 2L, 2L, 1L, 1L, 5L, 2L, 2L, 3L, 1L, 3L, 3L, 1L, 2L, 1L, 4L,
>
> 2L, 2L, 2L, 3L, 4L, 2L, 0L, 2L, 3L, 2L, 3L, 3L, 3L, 3L, 2L, 2L,
>
> 3L, 2L, 1L, 3L, 3L, 2L, 3L, 2L, 3L, 1L, 2L, 1L, 2L, 1L, 2L, 1L,
>
> 2L, 3L, 3L, 2L, 2L, 3L, 1L, 3L, 4L, 3L, 2L, 2L, 2L, 1L, 4L, 2L,
>
> 3L, 3L, 2L, 2L, 4L, 3L, 4L, 2L, 2L, 1L, 3L, 2L, 2L, 0L, 2L, 2L,
>
> 4L, 1L, 3L, 1L, 2L, 2L, 1L, 2L, 3L, 2L, 1L, 1L, 2L, 2L, 2L, 1L,
>
> 3L, 1L, 2L, 2L, 2L, 2L, 5L, 0L, 3L, 5L, 2L, 2L, 0L, 2L, 4L, 2L,
>
> 0L, 1L, 2L, 2L, 1L, 2L, 3L, 3L, 2L, 4L, 2L, 2L, 3L, 2L, 3L, 4L,
>
> 3L, 2L, 2L, 3L, 4L, 2L, 1L, 3L, 3L, 2L, 2L, 3L, 5L, 1L, 2L, 2L,
>
> 2L, 1L, 1L, 2L, 3L, 3L, 2L, 2L, 2L, 3L, 1L, 2L, 1L, 2L, 1L, 5L,
>
> 3L, 5L, 2L, 1L, 2L, 1L, 1L, 0L, 0L, 2L, 1L, 2L, 2L, 2L, 1L, 3L,
>
> 1L, 1L, 2L, 1L, 2L, 1L, 2L, 3L, 2L, 3L, 1L, 1L, 1L, 1L, 3L, 2L,
>
> 2L, 2L, 4L, 2L, 3L, 1L, 2L, 2L, 1L, 1L, 4L, 2L, 3L, 2L, 2L, 2L,
>
> 1L, 1L, 1L, 2L, 1L, 5L, 4L, 2L, 2L, 3L, 3L, 1L, 1L, 2L, 1L, 1L,
>
> 3L, 2L, 2L, 3L, 1L, 2L, 3L, 4L, 2L, 1L, 5L, 3L, 4L, 1L, 2L, 3L,
>
> 3L, 2L, 4L, 1L, 3L, 3L, 3L, 4L, 3L, 3L, 3L, 3L, 4L, 1L, 4L, 2L,
>
> 3L, 1L, 1L, 2L, 1L, 3L, 3L, 2L, 1L, 2L, 1L, 2L, 3L, 2L, 3L, 2L,
>
> 2L, 1L, 2L, 2L, 1L, 0L, 3L, 1L, 4L, 2L, 2L, 1L, 2L, 2L, 3L, 2L,
>
> 2L, 4L, 3L, 3L, 2L, 3L, 2L, 2L, 3L, 2L, 2L, 2L, 2L, 2L, 2L, 1L,
>
> 2L, 1L, 2L, 3L, 2L, 3L, 1L, 1L, 1L, 2L, 3L, 2L, 0L, 3L, 3L, 2L,
>
> 3L, 2L, 3L, 3L, 1L, 3L, 3L, 3L, 4L, 2L, 2L, 1L, 2L, 4L, 4L, 1L,
>
> 4L, 3L, 2L, 1L, 1L, 2L, 2L, 3L, 5L, 2L, 2L, 1L, 1L, 1L, 2L, 3L,
>
> 2L, 1L, 1L, 2L, 2L, 2L, 1L, 2L, 0L, 2L, 2L, 1L, 3L, 3L, 3L, 2L,
>
> 3L, 2L, 2L, 2L, 3L, 3L, 2L, 3L, 2L, 2L, 1L, 3L, 3L, 2L, 0L, 1L,
>
> 1L, 2L, 0L, 1L, 2L, 2L, 1L, 3L, 2L, 3L, 3L, 1L, 3L, 2L, 2L, 2L,
>
> 1L, 3L, 2L, 3L, 3L, 3L, 5L, 2L, 3L, 4L, 4L, 2L, 4L, 2L, 2L, 5L,
>
> 1L, 4L, 2L, 3L, 2L, 2L, 2L, 2L, 3L, 3L, 2L, 1L, 2L, 2L, 1L, 1L,
>
> 5L, 1L, 1L, 3L, 2L, 2L, 1L, 1L, 4L, 2L, 3L, 3L, 4L, 1L, 1L, 2L,
>
> 5L, 1L, 2L, 2L, 2L, 2L, 3L, 1L, 3L, 1L, 2L, 5L, 3L, 3L, 2L, 2L,
>
> 3L, 1L, 3L, 2L, 3L, 1L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 2L, 1L, 3L,
>
> 3L, 3L, 1L, 1L, 3L, 3L, 1L, 2L, 2L, 2L, 3L, 2L, 2L, 3L, 1L, 2L,
>
> 1L, 3L, 1L, 2L, 2L, 2L, 1L, 2L, 2L, 1L, 2L, 2L, 3L, 1L, 3L, 1L,
>
> 1L, 3L, 3L, 0L, 2L, 2L, 2L, 3L, 1L, 3L, 1L, 1L, 1L, 2L, 1L, 1L,
>
> 4L, 2L, 2L, 2L, 3L, 1L, 2L, 1L, 2L, 3L, 2L, 3L, 1L, 1L, 1L, 3L,
>
> 2L, 1L, 1L, 1L, 3L, 3L, 4L, 3L, 2L, 2L, 2L, 2L, 3L, 3L, 2L, 5L,
>
> 3L, 0L, 3L, 2L, 2L, 3L, 2L, 1L, 1L, 1L, 3L), psd = c(4L, 2L,
>
> 4L, 2L, 2L, 3L, 5L, 4L, 3L, 3L, 5L, 4L, 5L, 4L, 2L, 4L, 4L, 2L,
>
> 3L, 3L, 3L, 1L, 3L, 4L, 3L, 4L, 3L, 0L, 4L, 4L, 4L, 4L, 4L, 1L,
>
> 3L, 4L, 4L, 3L, 2L, 2L, 2L, 4L, 2L, 3L, 4L, 0L, 2L, 3L, 5L, 4L,
>
> 4L, 3L, 4L, 4L, 2L, 4L, 4L, 3L, 2L, 4L, 4L, 3L, 3L, 5L, 2L, 3L,
>
> 4L, 3L, 4L, 3L, 3L, 1L, 2L, 2L, 2L, 0L, 3L, 1L, 2L, 3L, 3L, 3L,
>
> 0L, 2L, 4L, 3L, 3L, 1L, 3L, 4L, 4L, 4L, 3L, 3L, 4L, 4L, 4L, 1L,
>
> 4L, 3L, 2L, 3L, 1L, 5L, 1L, 4L, 4L, 3L, 2L, 4L, 3L, 3L, 3L, 2L,
>
> 4L, 2L, 4L, 3L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 2L, 3L, 3L, 2L, 3L,
>
> 3L, 3L, 2L, 3L, 3L, 4L, 4L, 3L, 2L, 3L, 3L, 2L, 3L, 2L, 4L, 4L,
>
> 0L, 3L, 4L, 3L, 2L, 3L, 2L, 3L, 4L, 3L, 3L, 4L, 2L, 3L, 3L, 1L,
>
> 0L, 4L, 4L, 2L, 3L, 4L, 4L, 4L, 2L, 3L, 3L, 3L, 2L, 1L, 3L, 4L,
>
> 4L, 4L, 4L, 4L, 2L, 3L, 2L, 4L, 4L, 2L, 3L, 3L, 4L, 3L, 3L, 2L,
>
> 3L, 3L, 3L, 0L, 2L, 4L, 2L, 4L, 4L, 4L, 3L, 4L, 3L, 3L, 4L, 2L,
>
> 4L, 3L, 4L, 0L, 4L, 4L, 4L, 4L, 3L, 4L, 4L, 4L, 4L, 4L, 3L, 4L,
>
> 5L, 4L, 3L, 4L, 3L, 2L, 3L, 4L, 4L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
>
> 4L, 4L, 3L, 4L, 3L, 4L, 4L, 4L, 3L, 3L, 2L, 3L, 4L, 3L, 1L, 4L,
>
> 3L, 1L, 4L, 3L, 0L, 1L, 5L, 3L, 1L, 3L, 4L, 4L, 5L, 4L, 2L, 2L,
>
> 2L, 3L, 3L, 4L, 5L, 4L, 3L, 3L, 4L, 3L, 5L, 4L, 3L, 2L, 4L, 1L,
>
> 4L, 3L, 2L, 3L, 3L, 3L, 0L, 4L, 1L, 3L, 3L, 3L, 4L, 4L, 2L, 4L,
>
> 3L, 4L, 4L, 4L, 2L, 2L, 2L, 3L, 3L, 2L, 3L, 2L, 4L, 3L, 5L, 2L,
>
> 4L, 4L, 2L, 5L, 2L, 3L, 4L, 2L, 4L, 3L, 5L, 4L, 2L, 3L, 3L, 3L,
>
> 3L, 3L, 3L, 2L, 2L, 4L, 4L, 1L, 5L, 3L, 4L, 4L, 1L, 4L, 3L, 3L,
>
> 4L, 4L, 2L, 3L, 2L, 0L, 4L, 2L, 1L, 3L, 4L, 4L, 3L, 3L, 3L, 2L,
>
> 4L, 4L, 5L, 3L, 2L, 4L, 4L, 3L, 4L, 3L, 3L, 0L, 2L, 3L, 2L, 0L,
>
> 4L, 3L, 3L, 2L, 3L, 2L, 3L, 4L, 2L, 5L, 4L, 3L, 4L, 3L, 1L, 3L,
>
> 4L, 5L, 3L, 4L, 3L, 4L, 2L, 3L, 2L, 4L, 3L, 0L, 3L, 4L, 4L, 1L,
>
> 2L, 3L, 3L, 3L, 3L, 4L, 3L, 2L, 2L, 3L, 4L, 2L, 3L, 2L, 4L, 2L,
>
> 4L, 1L, 4L, 5L, 3L, 4L, 3L, 0L, 3L, 4L, 3L, 2L, 4L, 3L, 3L, 1L,
>
> 4L, 2L, 2L, 4L, 3L, 2L, 3L, 4L, 5L, 2L, 4L, 2L, 2L, 2L, 2L, 3L,
>
> 3L, 3L, 3L, 3L, 3L, 3L, 1L, 2L, 4L, 3L, 4L, 2L, 4L, 2L, 3L, 4L,
>
> 2L, 3L, 2L, 3L, 4L, 3L, 2L, 1L, 2L, 3L, 4L, 3L, 2L, 4L, 1L, 1L,
>
> 4L, 4L, 2L, 3L, 2L, 3L, 2L, 2L, 4L, 2L, 4L, 3L, 2L, 4L, 3L, 4L,
>
> 4L, 2L, 3L, 2L, 4L, 2L, 1L, 3L, 1L, 2L, 2L, 4L, 3L, 2L, 4L, 2L,
>
> 3L, 4L, 3L, 3L, 5L, 4L, 2L, 4L, 1L, 3L, 2L, 3L, 2L, 2L, 2L, 3L,
>
> 4L, 2L, 0L, 2L, 1L, 2L, 2L, 3L, 3L, 4L, 4L, 4L, 3L, 3L, 3L, 1L,
>
> 4L, 3L, 1L, 3L, 2L, 1L, 3L, 2L, 3L, 1L, 2L, 1L, 3L, 4L, 4L, 3L,
>
> 1L, 3L, 4L, 2L, 3L, 4L, 5L, 4L, 3L, 3L, 3L, 3L, 4L, 4L, 4L, 4L,
>
> 2L, 3L, 3L, 2L, 3L, 3L, 1L, 2L, 3L, 3L, 3L, 2L, 4L, 0L, 3L, 3L,
>
> 2L, 5L, 3L, 4L, 5L, 4L, 1L, 2L, 3L, 4L, 2L, 2L, 5L, 3L, 4L, 3L,
>
> 2L, 4L, 3L, 3L, 3L, 4L, 3L, 4L, 1L, 2L, 4L, 3L, 3L, 3L, 3L, 4L,
>
> 2L, 2L, 3L, 4L, 1L, 3L, 5L, 3L, 2L, 3L, 2L, 4L, 4L, 3L, 3L, 3L,
>
> 4L, 1L, 4L, 2L, 3L, 4L, 4L, 2L, 4L, 3L, 4L, 2L, 4L, 3L, 3L, 3L,
>
> 2L, 3L, 3L, 3L, 3L, 2L, 3L, 4L, 2L, 2L, 2L, 4L, 3L, 2L, 2L, 2L,
>
> 5L, 4L, 4L, 4L, 5L, 3L, 4L, 2L, 4L, 3L, 0L, 4L, 4L, 5L, 4L, 4L,
>
> 4L, 4L, 5L, 2L, 4L, 3L, 2L, 4L, 3L, 2L, 1L, 4L, 0L, 4L, 3L, 5L,
>
> 4L, 4L, 1L, 3L, 1L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L,
>
> 2L, 3L, 3L, 3L, 4L, 1L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 2L,
>
> 4L, 1L, 1L, 1L, 2L, 3L, 0L, 4L, 5L, 1L, 3L, 3L, 2L, 3L, 2L, 2L,
>
> 4L, 2L, 2L, 4L, 2L, 1L, 3L, 3L, 2L, 3L, 1L, 3L, 2L, 0L, 3L, 1L,
>
> 2L, 2L, 3L, 2L, 3L, 2L, 3L, 1L, 4L, 3L, 1L, 1L, 2L, 5L, 1L, 3L,
>
> 3L, 3L, 2L, 1L, 2L, 0L, 4L, 5L, 2L, 3L, 2L, 3L, 4L, 1L, 4L, 3L,
>
> 2L, 4L, 0L, 1L, 4L, 2L, 4L, 4L, 3L, 3L, 4L, 1L, 3L, 3L, 2L, 2L,
>
> 4L, 4L, 4L, 4L, 2L, 4L, 4L, 4L, 3L, 4L, 3L, 5L, 2L, 2L, 2L, 3L,
>
> 2L, 3L, 4L, 3L, 3L, 4L, 3L, 4L, 3L, 3L, 1L, 3L, 4L, 4L, 1L, 3L,
>
> 2L, 2L, 4L, 4L, 4L, 0L, 4L, 2L, 2L, 3L, 3L, 4L, 3L, 5L, 2L, 3L,
>
> 2L, 4L, 2L, 4L, 4L, 1L, 4L, 4L, 0L, 4L, 3L, 4L, 3L, 4L, 2L, 3L,
>
> 4L, 3L, 3L, 3L, 5L, 3L, 0L, 2L, 4L, 2L, 3L, 4L, 2L, 4L, 3L, 3L,
>
> 3L, 3L, 3L, 2L, 3L, 4L, 3L, 4L, 4L, 3L, 4L, 4L, 4L, 4L, 5L, 2L,
>
> 3L, 3L, 3L, 2L, 3L, 3L, 3L, 3L, 2L, 3L, 4L, 4L, 3L, 3L, 3L, 4L,
>
> 2L, 3L, 0L, 3L, 4L, 4L, 1L, 2L, 1L, 2L, 2L, 2L, 3L, 5L, 3L, 4L,
>
> 1L, 0L, 4L, 3L, 3L, 4L, 3L, 3L, 2L, 3L, 3L, 2L, 1L, 2L, 2L, 3L,
>
> 4L, 3L, 4L, 4L, 3L, 3L, 4L, 2L, 2L, 3L, 3L, 3L, 3L, 4L, 3L, 4L,
>
> 2L, 3L, 3L, 5L, 3L, 2L, 4L, 3L, 4L, 1L, 2L, 3L, 2L, 2L, 4L, 4L,
>
> 3L, 4L, 4L, 3L, 3L, 4L, 4L, 2L, 4L, 3L, 4L, 3L, 4L, 3L, 4L, 3L,
>
> 4L, 1L, 2L, 3L, 4L, 2L, 3L, 3L, 3L, 3L, 1L, 4L, 5L, 4L, 2L, 3L,
>
> 3L, 2L, 2L, 1L, 2L, 4L, 3L, 4L, 4L, 4L, 3L, 2L, 1L, 1L, 2L, 2L,
>
> 2L, 3L, 1L, 2L, 4L, 4L, 4L, 4L, 1L, 2L, 2L, 2L, 4L, 0L, 3L, 3L,
>
> 4L, 4L, 2L, 3L, 0L, 3L, 3L, 2L, 4L, 2L, 2L, 4L, 3L, 2L, 3L, 3L,
>
> 1L, 4L, 3L, 2L, 4L, 2L, 4L, 3L, 3L, 4L, 3L, 4L, 3L, 4L, 5L, 3L,
>
> 4L, 0L, 3L, 4L, 2L, 3L, 3L, 3L, 1L, 1L, 2L, 2L, 3L, 2L, 1L, 1L,
>
> 2L, 3L, 4L, 4L, 2L, 3L, 3L, 4L, 2L, 4L, 1L, 2L, 4L, 2L, 2L, 3L,
>
> 4L, 3L, 1L, 2L, 2L, 3L, 4L, 3L, 4L, 4L, 4L, 2L, 3L, 4L, 2L, 2L,
>
> 3L, 3L, 3L, 4L, 3L, 1L, 0L, 3L, 2L, 2L, 3L, 3L, 4L, 3L, 4L, 1L,
>
> 2L, 4L, 0L, 3L, 3L, 3L, 2L, 3L, 2L, 2L, 2L, 3L, 0L, 4L, 2L, 3L,
>
> 2L, 4L, 2L, 4L, 3L, 3L, 1L, 4L, 2L, 3L, 2L, 3L, 2L, 4L, 2L, 4L,
>
> 4L, 2L, 1L, 2L, 2L, 4L, 3L, 2L, 3L, 3L, 2L, 3L, 4L, 4L, 3L, 2L,
>
> 3L, 3L, 2L, 4L, 3L, 3L, 2L, 3L, 4L, 4L, 2L, 3L, 3L, 3L, 4L, 2L,
>
> 2L, 1L, 4L, 2L, 3L, 2L, 2L, 3L, 2L, 0L, 3L, 2L, 2L, 2L, 2L, 3L,
>
> 4L, 4L, 2L, 3L, 3L, 2L, 3L, 2L, 4L, 3L, 4L, 1L, 4L, 2L, 1L, 1L,
>
> 2L, 4L, 4L, 3L, 2L, 3L, 4L, 2L, 2L, 2L, 3L, 4L, 2L, 2L, 1L, 2L,
>
> 1L, 4L, 2L, 2L, 4L, 4L, 3L, 5L, 2L, 4L, 4L, 2L, 2L, 3L, 3L, 3L,
>
> 4L, 3L, 1L, 4L, 2L, 2L, 4L, 1L, 1L, 4L, 0L, 2L, 2L, 1L, 2L, 0L,
>
> 1L, 2L, 4L, 2L, 3L, 2L, 3L, 5L, 4L, 4L, 2L, 3L, 2L, 1L, 2L, 4L,
>
> 1L, 4L, 3L, 1L, 2L, 5L, 4L, 0L, 4L, 2L, 3L, 1L, 4L, 0L, 3L, 2L,
>
> 4L, 2L, 2L, 3L, 4L, 4L, 2L, 0L, 2L, 2L, 2L, 2L, 3L, 2L, 2L, 3L,
>
> 4L, 3L, 3L, 3L, 3L, 4L, 4L, 0L, 3L, 2L, 2L, 2L, 2L, 4L, 2L, 2L,
>
> 4L, 3L, 1L, 2L, 1L, 2L, 1L, 4L, 4L, 4L, 4L, 4L, 2L, 2L, 3L, 5L,
>
> 3L, 3L, 4L, 3L, 4L, 1L, 3L, 3L, 4L, 2L, 4L, 4L, 2L, 4L, 2L, 4L,
>
> 2L, 3L, 3L, 3L, 3L, 4L, 5L, 3L, 3L, 3L, 2L, 2L, 3L, 2L, 3L, 2L,
>
> 1L, 3L), gpa = structure(c(4L, 4L, 3L, 3L, 3L, 3L, 5L, 3L, 5L,
>
> 3L, 5L, 1L, 3L, 2L, 5L, 3L, 3L, 2L, 5L, 1L, 2L, 2L, 1L, 3L, 3L,
>
> 2L, 2L, 2L, 2L, 5L, 1L, 5L, 3L, 3L, 2L, 3L, 2L, 5L, 4L, 2L, 2L,
>
> 5L, 5L, 3L, 5L, 3L, 2L, 3L, 5L, 3L, 3L, 2L, 2L, 2L, 5L, 2L, 5L,
>
> 2L, 3L, 4L, 3L, 3L, 2L, 3L, 3L, 4L, 3L, 4L, 3L, 2L, 4L, 1L, 4L,
>
> 3L, 3L, 5L, 5L, 5L, 5L, 3L, 5L, 3L, 4L, 5L, 3L, 3L, 4L, 2L, 2L,
>
> 4L, 5L, 3L, 4L, 2L, 4L, 2L, 3L, 3L, 4L, 3L, 4L, 4L, 5L, 4L, 2L,
>
> 4L, 4L, 2L, 4L, 4L, 3L, 2L, 4L, 5L, 4L, 4L, 3L, 3L, 2L, 3L, 1L,
>
> 2L, 2L, 4L, 3L, 1L, 3L, 2L, 4L, 4L, 4L, 3L, 4L, 3L, 5L, 3L, 2L,
>
> 4L, 2L, 4L, 4L, 5L, 5L, 5L, 3L, 2L, 3L, 3L, 4L, 3L, 5L, 3L, 3L,
>
> 3L, 3L, 2L, 5L, 3L, 4L, 4L, 1L, 1L, 4L, 3L, 4L, 5L, 5L, 3L, 2L,
>
> 3L, 5L, 2L, 4L, 3L, 3L, 4L, 4L, 2L, 3L, 2L, 4L, 5L, 4L, 3L, 4L,
>
> 2L, 5L, 2L, 2L, 2L, 4L, 5L, 4L, 1L, 4L, 2L, 4L, 5L, 4L, 3L, 3L,
>
> 3L, 4L, 4L, 4L, 3L, 4L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 3L, 4L, 3L,
>
> 3L, 2L, 4L, 4L, 4L, 5L, 5L, 4L, 3L, 4L, 3L, 2L, 2L, 2L, 3L, 2L,
>
> 3L, 2L, 2L, 1L, 5L, 5L, 4L, 2L, 3L, 3L, 3L, 2L, 2L, 4L, 2L, 1L,
>
> 3L, 3L, 3L, 3L, 3L, 2L, 4L, 3L, 2L, 4L, 5L, 5L, 4L, 5L, 5L, 5L,
>
> 4L, 1L, 2L, 5L, 4L, 4L, 3L, 4L, 5L, 4L, 5L, 1L, 2L, 3L, 4L, 5L,
>
> 4L, 1L, 4L, 2L, 2L, 3L, 4L, 2L, 3L, 2L, 4L, 4L, 5L, 2L, 2L, 4L,
>
> 3L, 2L, 5L, 4L, 5L, 3L, 3L, 1L, 5L, 3L, 2L, 5L, 3L, 3L, 4L, 4L,
>
> 4L, 2L, 4L, 5L, 4L, 5L, 4L, 4L, 4L, 3L, 3L, 4L, 4L, 3L, 4L, 5L,
>
> 3L, 2L, 3L, 5L, 4L, 5L, 4L, 2L, 4L, 4L, 2L, 4L, 5L, 4L, 3L, 3L,
>
> 3L, 4L, 3L, 5L, 4L, 4L, 3L, 3L, 5L, 2L, 2L, 4L, 1L, 4L, 1L, 4L,
>
> 3L, 4L, 3L, 4L, 2L, 4L, 2L, 2L, 5L, 1L, 2L, 1L, 4L, 1L, 3L, 5L,
>
> 2L, 5L, 3L, 3L, 2L, 4L, 4L, 4L, 4L, 5L, 4L, 1L, 5L, 5L, 3L, 3L,
>
> 3L, 4L, 4L, 2L, 5L, 3L, 2L, 3L, 4L, 2L, 2L, 5L, 4L, 3L, 3L, 4L,
>
> 2L, 2L, 3L, 3L, 4L, 3L, 3L, 4L, 3L, 5L, 2L, 2L, 3L, 5L, 4L, 4L,
>
> 4L, 3L, 4L, 3L, 2L, 3L, 3L, 5L, 5L, 5L, 5L, 5L, 2L, 4L, 4L, 4L,
>
> 4L, 4L, 2L, 2L, 5L, 3L, 3L, 2L, 5L, 5L, 1L, 5L, 3L, 4L, 4L, 3L,
>
> 5L, 2L, 5L, 4L, 5L, 5L, 4L, 4L, 4L, 3L, 5L, 2L, 5L, 4L, 4L, 5L,
>
> 1L, 2L, 5L, 5L, 4L, 3L, 4L, 2L, 1L, 1L, 4L, 3L, 5L, 4L, 2L, 3L,
>
> 3L, 3L, 3L, 4L, 2L, 5L, 4L, 5L, 5L, 4L, 5L, 4L, 2L, 3L, 2L, 2L,
>
> 2L, 3L, 3L, 4L, 2L, 4L, 4L, 5L, 2L, 3L, 4L, 4L, 4L, 4L, 2L, 4L,
>
> 5L, 5L, 3L, 5L, 5L, 4L, 4L, 4L, 5L, 5L, 3L, 5L, 4L, 4L, 2L, 4L,
>
> 2L, 4L, 4L, 2L, 5L, 4L, 5L, 4L, 4L, 5L, 4L, 4L, 4L, 5L, 4L, 3L,
>
> 3L, 3L, 4L, 2L, 2L, 5L, 4L, 3L, 5L, 4L, 4L, 5L, 5L, 2L, 3L, 5L,
>
> 4L, 3L, 4L, 4L, 4L, 3L, 2L, 3L, 3L, 4L, 4L, 3L, 1L, 3L, 2L, 2L,
>
> 3L, 3L, 2L, 4L, 3L, 5L, 3L, 4L, 3L, 4L, 3L, 5L, 4L, 3L, 2L, 2L,
>
> 5L, 2L, 5L, 4L, 5L, 2L, 3L, 4L, 2L, 3L, 2L, 4L, 5L, 5L, 2L, 3L,
>
> 2L, 4L, 3L, 2L, 5L, 2L, 5L, 2L, 5L, 3L, 3L, 3L, 4L, 2L, 2L, 3L,
>
> 1L, 3L, 3L, 2L, 4L, 4L, 1L, 4L, 3L, 4L, 3L, 3L, 4L, 3L, 4L, 4L,
>
> 3L, 2L, 4L, 5L, 5L, 5L, 5L, 5L, 5L, 4L, 1L, 4L, 4L, 2L, 2L, 3L,
>
> 3L, 2L, 2L, 5L, 5L, 3L, 3L, 4L, 5L, 4L, 4L, 3L, 3L, 5L, 2L, 4L,
>
> 4L, 4L, 3L, 4L, 4L, 5L, 4L, 4L, 4L, 3L, 5L, 5L, 4L, 3L, 3L, 3L,
>
> 3L, 4L, 3L, 3L, 3L, 4L, 4L, 3L, 4L, 3L, 4L, 3L, 3L, 5L, 4L, 4L,
>
> 5L, 5L, 5L, 5L, 4L, 5L, 5L, 2L, 3L, 3L, 4L, 5L, 4L, 3L, 5L, 3L,
>
> 1L, 5L, 5L, 4L, 1L, 4L, 3L, 4L, 4L, 3L, 4L, 3L, 4L, 5L, 2L, 3L,
>
> 2L, 2L, 3L, 3L, 5L, 3L, 2L, 5L, 4L, 2L, 5L, 5L, 5L, 5L, 2L, 3L,
>
> 3L, 5L, 3L, 2L, 5L, 2L, 4L, 4L, 5L, 4L, 4L, 3L, 2L, 3L, 5L, 4L,
>
> 5L, 4L, 5L, 3L, 4L, 5L, 3L, 5L, 5L, 2L, 4L, 3L, 4L, 4L, 3L, 3L,
>
> 5L, 3L, 5L, 4L, 5L, 5L, 4L, 2L, 1L, 5L, 3L, 4L, 5L, 3L, 3L, 2L,
>
> 2L, 3L, 2L, 4L, 3L, 4L, 5L, 3L, 4L, 4L, 2L, 5L, 2L, 3L, 4L, 4L,
>
> 4L, 4L, 3L, 5L, 4L, 4L, 3L, 4L, 2L, 3L, 4L, 2L, 2L, 2L, 3L, 3L,
>
> 4L, 2L, 3L, 3L, 4L, 3L, 4L, 4L, 2L, 4L, 4L, 3L, 4L, 3L, 1L, 3L,
>
> 2L, 2L, 4L, 2L, 3L, 5L, 4L, 4L, 3L, 3L, 5L, 4L, 5L, 4L, 4L, 4L,
>
> 4L, 3L, 4L, 2L, 4L, 4L, 2L, 4L, 2L, 5L, 4L, 4L, 5L, 5L, 5L, 3L,
>
> 3L, 3L, 5L, 5L, 2L, 5L, 4L, 5L, 4L, 3L, 3L, 4L, 5L, 4L, 3L, 4L,
>
> 4L, 2L, 3L, 5L, 4L, 5L, 2L, 5L, 4L, 3L, 2L, 2L, 3L, 2L, 4L, 3L,
>
> 3L, 3L, 2L, 4L, 5L, 4L, 1L, 4L, 1L, 3L, 3L, 4L, 5L, 3L, 3L, 3L,
>
> 4L, 4L, 4L, 3L, 2L, 3L, 2L, 2L, 4L, 2L, 3L, 2L, 3L, 2L, 3L, 4L,
>
> 2L, 4L, 2L, 4L, 4L, 3L, 4L, 4L, 3L, 4L, 4L, 2L, 3L, 4L, 3L, 2L,
>
> 4L, 5L, 4L, 4L, 4L, 5L, 5L, 5L, 5L, 4L, 3L, 3L, 3L, 5L, 3L, 4L,
>
> 2L, 4L, 2L, 5L, 5L, 3L, 3L, 4L, 3L, 3L, 5L, 3L, 3L, 5L, 4L, 4L,
>
> 2L, 4L, 5L, 5L, 3L, 2L, 2L, 3L, 3L, 4L, 4L, 2L, 5L, 2L, 5L, 4L,
>
> 4L, 4L, 2L, 5L, 3L, 2L, 4L, 4L, 3L, 2L, 2L, 4L, 3L, 3L, 3L, 5L,
>
> 3L, 4L, 2L, 5L, 4L, 2L, 2L, 3L, 4L, 4L, 5L, 3L, 5L, 5L, 5L, 5L,
>
> 5L, 5L, 5L, 5L, 5L, 4L, 3L, 4L, 5L, 2L, 4L, 5L, 5L, 3L, 3L, 5L,
>
> 5L, 5L, 4L, 5L, 5L, 5L, 5L, 5L, 3L, 3L, 5L, 5L, 3L, 3L, 5L, 5L,
>
> 5L, 3L, 4L, 3L, 3L, 4L, 4L, 4L, 5L, 4L, 4L, 4L, 4L, 4L, 2L, 4L,
>
> 5L, 5L, 4L, 3L, 2L, 4L, 2L, 3L, 4L, 1L, 3L, 3L, 5L, 5L, 5L, 5L,
>
> 3L, 4L, 3L, 4L, 3L, 5L, 5L, 5L, 5L, 4L, 3L, 3L, 3L, 3L, 3L, 4L,
>
> 3L, 3L, 5L, 3L, 3L, 3L, 4L, 4L, 4L, 4L, 3L, 5L, 4L, 5L, 5L, 4L,
>
> 4L, 4L, 5L, 5L, 5L, 3L, 4L, 2L, 4L, 4L, 3L, 4L, 2L, 5L, 4L, 4L,
>
> 4L, 3L, 5L, 4L, 5L, 3L, 4L, 4L, 4L, 3L, 4L, 4L, 4L, 2L, 2L, 5L,
>
> 5L, 5L, 5L, 4L, 2L, 4L, 5L, 4L, 4L, 3L, 2L, 2L, 5L, 5L, 4L, 5L,
>
> 5L, 4L, 5L, 3L, 4L, 4L, 4L, 2L, 5L, 5L, 2L, 4L, 2L, 4L, 5L, 5L,
>
> 5L, 3L, 3L, 5L, 1L, 2L, 3L, 2L, 3L, 1L, 1L, 3L, 3L, 3L, 2L, 3L,
>
> 4L, 4L, 4L, 3L, 3L, 2L, 4L, 5L, 5L, 5L, 4L, 4L, 4L, 3L, 3L, 5L,
>
> 3L, 4L, 5L, 5L, 4L, 4L, 5L, 2L, 3L, 5L, 4L, 1L, 3L, 3L, 3L, 2L,
>
> 3L, 3L, 2L, 5L, 2L, 3L, 3L, 3L, 3L, 3L, 2L, 4L, 5L, 2L, 5L, 5L,
>
> 4L, 4L, 5L, 4L, 2L, 3L, 5L, 4L, 5L, 4L, 3L, 4L, 2L, 4L, 2L, 2L,
>
> 4L, 5L, 5L, 5L, 5L, 3L, 4L, 4L, 4L, 3L, 2L, 4L, 4L, 3L, 2L, 3L,
>
> 3L, 4L, 2L, 2L, 4L, 5L, 4L, 5L, 4L, 4L, 4L, 4L, 5L, 4L, 4L, 2L,
>
> 3L, 2L, 4L, 4L, 2L, 5L, 5L, 5L, 5L, 5L, 4L, 5L, 5L, 4L, 2L, 5L,
>
> 4L, 5L, 5L, 4L, 5L, 2L, 3L, 4L, 2L, 3L, 4L, 2L, 4L, 2L, 5L, 5L,
>
> 4L, 4L, 5L, 5L, 5L, 5L, 4L, 5L, 1L, 4L, 3L, 4L, 4L, 4L, 4L, 2L,
>
> 4L, 4L, 4L, 5L, 1L, 3L, 5L, 2L, 4L, 4L, 2L, 4L, 4L, 2L, 2L, 5L,
>
> 4L, 5L, 5L, 5L, 4L, 4L, 5L, 1L, 1L, 5L, 4L, 3L, 3L, 5L, 4L, 4L,
>
> 4L, 5L, 4L, 5L, 2L, 3L, 3L, 4L, 5L, 4L, 2L, 2L, 5L, 2L, 3L, 5L,
>
> 5L, 2L, 4L, 3L, 5L, 2L, 5L, 5L, 5L, 3L, 4L), .Label = c("1",
>
> "2", "3", "4", "5"), class = "factor")), .Names = c("item25",
>
> "psd", "gpa"), row.names = c(NA, -1428L), class = "data.frame")
>
>
>
> --
>
> *Edward H Patzelt | Clinical Science PhD StudentPsychology | Harvard
> University *
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.