modify strip labels with given text using lattice package
On Aug 31, 2015, at 1:17 PM, Luigi Marongiu wrote:
Dear all, I am drawing a barchart plot with lattice and the resulting strips are taking the value of the variable being compared (in this example "assay"). However I would like to write myself the value to place into the strips, let's say I want to call the variables as "molecular test" and "serological test" the values "a" and "b" respectively within "assay". I have tried different approaches taken from the web but nothing worked.
Look at ?barchart in the section on arguments to strip and then at ?strip.default for how to use `strip.custom`. If you needed finer control there are functions that return the panel, but this request did not require using it:
barchart(
test ~ count|assay,
df,
groups = res,
stack = TRUE,
main = "Comparison of test results",
xlab = "Count",
col = c("yellow", "blue"),
par.settings = list(
strip.background = list(col="light grey"),
superpose.polygon=list(col= c("yellow", "blue"))
),
strip = strip.custom( factor.levels=c("molecular test","serological test") ),
scales = list(
alternating = FALSE
),
key = list(
space="top",
columns=2,
text=list(c("Negative", "Positive"), col="black"),
rectangles=list(col=c("yellow", "blue"))
)
)
Would you have any tip? Best regards Luigi
test <- rep(c("Adenovirus", "Rotavirus", "Norovirus", "Rotarix",
"Sapovirus"), 2)
res <- c(0, 1, 0, 1,0, 1,0, 1,0, 1, 0, 1, 0, 1,0, 1,0, 1,0, 1)
count <- rnorm(20)
assay <- c(rep("a", 10), rep("b", 10))
df <- data.frame(test, res, count, assay, stringsAsFactors = FALSE)
library(lattice)
barchart(
test ~ count|assay,
df,
groups = res,
stack = TRUE,
main = "Comparison of test results",
xlab = "Count",
col = c("yellow", "blue"),
par.settings = list(
strip.background = list(col="light grey"),
superpose.polygon=list(col= c("yellow", "blue"))
),
scales = list(
alternating = FALSE
),
key = list(
space="top",
columns=2,
text=list(c("Negative", "Positive"), col="black"),
rectangles=list(col=c("yellow", "blue"))
)
)
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