How to change font size in plot of cross-validation result from cvTools package in R? -

i try manipulate size of fonts (title , axis labels, especially) in plot of cross-validation result cvtools package in r. afraid not work:

library(cvtools) data(coleman) set.seed(1234)   # split n observations k groups used (repeated) k-fold cross-validation folds <- cvfolds(nrow(coleman), k = 5, r = 50)  # perform cross-validation ls regression model fitlm <- lm(y ~ ., data = coleman) cvfitlm <- cvlm(fitlm, cost = rtmspe, folds = folds, trim = 0.1)  # perform cross-validation mm regression model fitlmrob <- lmrob(y ~ ., data = coleman, k.max = 500) cvfitlmrob <- cvlmrob(fitlmrob, cost = rtmspe, folds = folds, trim = 0.1)  # combine results 1 object cvfits <- cvselect(ls = cvfitlm, mm = cvfitlmrob) 

the 2 lines below differ in plot points size, there no change in title font size / labels font size.

# plot combined results plot(cvfits, main = "foo_title") plot(cvfits, main = "foo_title", cex = 0.5, cex.main = 0.5, cex.lab = 0.5) 

what miss here?

base graphics par settings don't work lattice , other grid graphics. plot methods cvtools use lattice graphics. here ways change various font sizes in plot:

  plot(cvfits, cex=0.5,                                  # point markers        main = list("foo_title", cex = 1),                # title        xlab=list(cex=0.75), ylab=list(cex=0.75),         # axis titles        scales=list(x=list(cex=0.75), y=list(cex=0.75)))  # axis tick labels