[R] two questions about xyplot

[Richard Kwock]

Hi,

To answer your second question you can do something like this:

p<-xyplot(dvy ~ sessidx | case, group = numph, data=d66df, col = c(1:4),
    layout=c(1, 3), xlab= "Sessions",
    ylab = "Number of Seconds",
    type="l")

update(p, panel=function(...){
        panel.xyplot(...)
        panel.abline(v=6.5)
        panel.abline(v=12.5)
        panel.abline(v=18.5)
} )

By setting the "group" parameter in xyplot to be "numph",  xyplot will
plot different lines for each group of numph you have in each case.

For your first question, did you mean you want a text to display the
mean in each panel?

Richard


On Mon, Sep 23, 2013 at 10:41 AM, William Shadish <wshadish at ucmerced.edu> wrote:
> Dear R helpers,
>
> I am generating three artificial short interrupted time series datasets
> (single-case designs; call them Case 1, Case 2, Case 3) and then plotting
> them in xyplot. I will put the entire code below so you can reproduce. I
> have been unable to figure out how to do two things.
>
> 1. Each time series has 24 time points divided into four phases. Call them
> phases A, B, C, D for convenience. I have used running() to compute the
> means of the observations in each of these four parts; and I saved these as
> objects called mn1 (for Case 1), mn2 (Case 2) and mn3 (Case 3). So mn1
> contains the four means for A, B, C, D phases for Case 1, etc. I want to
> insert these means into the xyplot in the appropriate place. For instance,
> insert the first mean from mn1 into phase A of Case 1, the second mean into
> phase B of Case 1, and so forth until insert the fourth mean from mn3 into
> phase D of Case 3. Ideally, it would insert something like "M = 49.02" or
> "Xbar = 49.02" into phase A for Case 1.
>
> 2. The xyplot code I use creates a line connecting the data points, and that
> line is continuous over the entire graph. I would like to have the lines be
> discontinuous between phases. Phase changes are indicated by panel.abline()
> in the code, and occur at time points 6.5, 12.5, and 18.5. So, for example,
> I would like a line connecting the datapoints from 1 to 6, then 7-12, then
> 13-18, then 19-24 (but not including 6-7, 12-13, and 18-19).
>
> I appreciate any help you might be able to offer.
>
> Will Shadish
>
> Here is the code:
> #############################################################################
> library(gtools)
> library(lattice)
> ###g = .66
> z <- rnorm(24, mean = 0, sd = 10)
> w <- rnorm(24, mean = 0, sd = 10)
> ###change mean = to vary the effect size
> tm <- rnorm(6, mean = 10, sd = 10)
> b <- rep(0,6)
> c <- rep(1,6)
> tmt <- c(b,tm,b,tm)
> for (t in 2:24) z[t] <- 0.25 * z[t - 1] + w[t]
> dvy <- 50 + z + tmt
> jid <- rep(1,24)
> sid <- rep(1,24)
> pid <- rep(1,24)
> dvid <- rep(1,24)
> desvar <- rep(1,24)
> dvdir <- rep(0,24)
> sessidx <- c(1:24)
> m <- rep(1,6)
> n <- rep(2,6)
> o <- rep(3,6)
> p <- rep(4,6)
> numph <- c(m,n,o,p)
> phasebtm <- c(b,c,b,c)
> d1 <- cbind(jid,sid,pid,dvid,desvar,dvdir,dvy,sessidx,numph,phasebtm)
> mn1 <- running(dvy, width=6, by=6)
>
> #second dataset
> z <- rnorm(24, mean = 0, sd = 10)
> w <- rnorm(24, mean = 0, sd = 10)
> tm <- rnorm(6, mean = 10, sd = 10)
> b <- rep(0,6)
> c <- rep(1,6)
> tmt <- c(b,tm,b,tm)
> for (t in 2:24) z[t] <- 0.25 * z[t - 1] + w[t]
> dvy <- 50 + z + tmt
> jid <- rep(1,24)
> sid <- rep(1,24)
> pid <- rep(2,24)
> dvid <- rep(1,24)
> desvar <- rep(1,24)
> dvdir <- rep(0,24)
> sessidx <- c(1:24)
> m <- rep(1,6)
> n <- rep(2,6)
> o <- rep(3,6)
> p <- rep(4,6)
> numph <- c(m,n,o,p)
> phasebtm <- c(b,c,b,c)
> d2 <- cbind(jid,sid,pid,dvid,desvar,dvdir,dvy,sessidx,numph,phasebtm)
> mn2 <- running(dvy, width=6, by=6)
>
> #third dataset
> z <- rnorm(24, mean = 0, sd = 10)
> w <- rnorm(24, mean = 0, sd = 10)
> tm <- rnorm(6, mean = 10, sd = 10)
> b <- rep(0,6)
> c <- rep(1,6)
> tmt <- c(b,tm,b,tm)
> for (t in 2:24) z[t] <- 0.25 * z[t - 1] + w[t]
> dvy <- 50 + z + tmt
> jid <- rep(1,24)
> sid <- rep(1,24)
> pid <- rep(3,24)
> dvid <- rep(1,24)
> desvar <- rep(1,24)
> dvdir <- rep(0,24)
> sessidx <- c(1:24)
> m <- rep(1,6)
> n <- rep(2,6)
> o <- rep(3,6)
> p <- rep(4,6)
> numph <- c(m,n,o,p)
> phasebtm <- c(b,c,b,c)
> d3 <- cbind(jid,sid,pid,dvid,desvar,dvdir,dvy,sessidx,numph,phasebtm)
> mn3 <- running(dvy, width=6, by=6)
>
> #concatenate d1 d2 d3
> d66 <- rbind(d1, d2, d3)
> d66df <- as.data.frame(d66)
> d66df$case <- ordered(d66df$pid,
> levels = c(1,2,3),
> labels = c("Case 3", "Case 2", "Case 1"))
> p<-xyplot(dvy ~ sessidx | case, data=d66df,
>     layout=c(1, 3), xlab= "Sessions",
>     ylab = "Number of Seconds",
>     type="l")
> update(p, panel=function(...){
>         panel.xyplot(...)
>         panel.abline(v=6.5)
>         panel.abline(v=12.5)
>         panel.abline(v=18.5)
> } )
>
> --
> William R. Shadish
> Distinguished Professor
> Founding Faculty
>
> Mailing Address:
> William R. Shadish
> University of California
> School of Social Sciences, Humanities and Arts
> 5200 North Lake Rd
> Merced CA  95343
>
> Physical/Delivery Address:
> University of California Merced
> ATTN: William Shadish
> School of Social Sciences, Humanities and Arts
> Facilities Services Building A
> 5200 North Lake Rd.
> Merced, CA 95343
>
> 209-228-4372 voice
> 209-228-4007 fax (communal fax: be sure to include cover sheet)
> wshadish at ucmerced.edu
> http://faculty.ucmerced.edu/wshadish/index.htm
> http://psychology.ucmerced.edu
>
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