[R] bwlpot problems: printing, and tick labels

[Dimitri Shvorob]

Two problems with the code below. 

A. It produces empty JPEGs. When the 'bwplot' line alone is submitted, the
plot duly shows up.
B. When the 'bwplot' line alone is submitted, y labels are values 1 to 6,
not actual distinct values of y$maxthreads.
(C. I would, of course, prefer to produce plots for all distinct values of
x$maxthreads in a single swoop, on a single figure). 

Can anyone help?

Thank you.



library(lattice)
options(stringsAsFactors = F)

x = structure(list(mode = c("serial", "parallel", "parallel", "parallel", 
"serial", "parallel", "parallel", "parallel", "parallel", "serial", 
"parallel", "parallel", "parallel", "parallel", "parallel", "serial", 
"parallel", "parallel", "parallel", "serial", "parallel", "parallel", 
"parallel", "parallel", "serial", "parallel", "parallel", "parallel", 
"parallel", "parallel"), tasks = c(4L, 4L, 4L, 4L, 8L, 8L, 8L, 
8L, 8L, 16L, 16L, 16L, 16L, 16L, 16L, 4L, 4L, 4L, 4L, 8L, 8L, 
8L, 8L, 8L, 16L, 16L, 16L, 16L, 16L, 16L), maxthreads = c(0L, 
1L, 2L, 4L, 0L, 1L, 2L, 4L, 8L, 0L, 1L, 2L, 4L, 8L, 16L, 0L, 
1L, 2L, 4L, 0L, 1L, 2L, 4L, 8L, 0L, 1L, 2L, 4L, 8L, 16L), rep = c(1L, 
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L), task = c(0L, 
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L), time = c(1828L, 
1781L, 1656L, 2171L, 3281L, 3984L, 3468L, 2921L, 4015L, 7218L, 
7828L, 8093L, 6750L, 7515L, 8703L, 1734L, 2218L, 2343L, 2171L, 
3468L, 5281L, 3843L, 3687L, 3734L, 7156L, 8890L, 8937L, 7343L, 
7921L, 9203L), result = c(NA, NA, NA, NA, NA, NA, NA, NA, NA, 
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 
NA, NA, NA, NA, NA), success = c("True", "True", "True", "True", 
"True", "True", "True", "True", "True", "True", "True", "True", 
"True", "True", "True", "True", "True", "True", "True", "True", 
"True", "True", "True", "True", "True", "True", "True", "True", 
"True", "True")), .Names = c("mode", "tasks", "maxthreads", "rep", 
"task", "time", "result", "success"), class = "data.frame", row.names =
c(NA, 
-30L))

tt = unique(x$tasks)

for(i in 1:length(tt))
{
  y = subset(x, tasks = tt[i], select = c(maxthreads, rep, time)) 
  file = ...
  jpeg(file, height = 600, width = 1200)
  bwplot(maxthreads ~ time, 
       data = y,
       ylab = "maxthreads", 
       xlab = "time, ms")
  dev.off()
}

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