我一直在寻找如何换行文本。似乎应该有一种方法可以使用 labeller = label_wrap_gen(3) 但我不断收到错误：---边距错误（vars，边距）：未使用的参数（边距）
这是我的代码的一部分：
#simpson by protected status for domain FKNMS
ggplot(data = fk_strata_abun_diversity, aes(x = YEAR)) +
geom_point(aes(y = strata_simpson, color = "strata_simpson"),color = "blue") +
geom_line(aes(y = strata_simpson, color = "strata_simpson"), color = "blue") +
facet_grid(STRAT ~ protected_status,
labeller = labeller(.rows = strata_names, .cols = protected_status_names),
label_wrap_gen(width = 2)) + #error: in margins(vars, margins) : unused argument (margins) ??
labs(x = "Year", y = "Effective Number of Species") +
ggtitle("Simpson Diveristy of Reef Fish in the …