# NOT RUN {
s <- rast(ncols=5, nrows=5, nlyr=3)
nlyr(s)
names(s)
names(s) <- c('a', 'b', 'c')
# space is not valid
names(s)[2] <- 'hello world'
names(s)
# two invalid names
names(s) <- c('a', ' a ', '3')
s
# }
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