panel.bars {stripless}

strucplot Panel Functions

Description

Panel functions for strucplot.

Usage

panel.bars(..., summaryFUN = function(x) mean(x, na.rm = TRUE),
  col = "darkblue", grid = TRUE, col.grid = "lightgray")

Arguments

...

Arguments to barchart. See panel.barchart.

summaryFUN

The function that summarizes replicated response values. Default = fuction(x) mean(x, na.rm = TRUE).

col

Color of the bars. Default = "darkblue".

grid

Should an appropriate background grid be plotted? Default = TRUE.

col.grid

The background grid color. Default = "lightgray".

Details

panel.bars A wrapper for panel.barchart that plots bars that summarize the responses at each setting of the conditioning variables. By default, bars are vertical, but setting the optional parameter, horizontal to TRUE plots horizontal bars.

Examples

# A half fraction of a 2^5 full factorial with pseudo-replicate responses
# at each design point,

# Build the design matrix
x <- c(-1,1)
ff <- expand.grid(x,x,x,x)
ff[[5]] <- do.call(mapply,c(FUN=prod,ff))
ff <- ff[rep(1:16,e=2),] ## replicates each row twice
names(ff) <- LETTERS[1:5]

# Add a column for the response
ff$y <-c(155.5, 154.8, 158.4, 156.2, 154.8, 152.4, 159.7, 155.5, 161.8, 
159.7, 159, 158.4, 159.7, 157.7, 161.8, 158, 155.9, 151.7, 159, 
158, 154.1, 156.9, 158.4, 158.4, 159, 154.8, 158.4, 156.2, 161.1, 
156.9, 162.6, 159)

# Plot using panel.bars
strucplot(~ y|., data = ff, panel = panel.bars)

# It is often useful to plot the bars the other way, too
strucplot(~ y|., data = ff, panel = panel.bars, horizontal = TRUE)