如何在ggplot中爲facet_grid標籤包裝文本

Question

我一直在搜索如何包裝文本。似乎應該有一種方法來使用labeller = label_wrap_gen（3），但我不斷收到錯誤： ---邊緣誤差（變量，邊距）：未使用的參數（邊距）

這是我的代碼的一部分：

#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 Florida Keys by Strata") + 
theme(plot.title = element_text(hjust = 0.5, face = 'bold', size = 12)) + 
scale_x_continuous(limits = c(1999, 2016), breaks = c(1999:2016)) + 
scale_y_continuous(limits= c(0, 25), breaks = c(5,10,15,20,25)) 

預先感謝您的幫助

Answer 1

我發現labeller = labeller(label_wrap_gen(width = 2 ...不換行。

嘗試

facet_grid(STRAT ~ protected_status, 
    labeller = label_wrap_gen(width = 2, multi_line = TRUE))