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# Parameters in par()
?par; # example(par)
p72 <- par(no.readonly = FALSE) # 72 total parameters
p66 <- par(no.readonly = TRUE ) # 66 settable parameters
p06 <- p72[!(names(p72) %in% names(p66))] # 6 for queries and read-only
str(p72)
p72[1:3]
sort(noquote(names(p72)))
sort(noquote(names(p06)))
# Three uses of par()
# a. querying graphics state
par(c("pch", "col"))
# b. setting parameters
par(pch = 3, col = "red")
# c. Saving, setting, and retoring
oldPar <- par(mfrow = c(3, 2), col = "green") # save and set
oldPar # show old parameter values
par(c("mfrow", "col")) # show new parameter values
for (i in 1:6) {
plot(rnorm(100), pch = i) # draw graphs with new parameter values
}
par(oldPar) # restore old parameter values
par(c("mfrow", "col")) # show old parameter values again
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