在绘图 ggplot2 之间减少 space

Question

我正在使用 bookdown 和 emmeans 包。我正在尝试渲染一个 pdf，我可以在其中放置一系列相互之间最小 space 的情节

```{r 3AeMixEffCmass,out.width = c("32%","32%","32%"), fig.align = "center", fig.pos="!h",fig.show = 'hold',fig.cap='(ref:3AeMixEffCmass)', message=FALSE, warning=FALSE, echo=FALSE}

### plot letter identifier:
library(grid)
my_grob = grobTree(textGrob("A1", x=0.85,  y=0.95, hjust=0,  gp=gpar(col="black", fontsize=15, fontface="italic")))


library(ggplot2)
### Order the levels for printing:
cld.mixed_C_L$managem = factor(cld.mixed_C_L$managem, levels=c("WTH", "CH", "CHF")) 
### reset row number: 
cld.mixed_C_L<- with(cld.mixed_C_L, cld.mixed_C_L[order(managem),])
rownames(cld.mixed_C_L) <- NULL

cld.mixed_C_L 看起来像这样：

cld.mixed_C_L <- structure(list(managem = structure(c(1L, 3L, 2L), .Label = c("CH", 
+ "CHF", "WTH"), class = "factor"), response = c(2.46142878854869, 
+ 2.47526369032351, 3.25797765207699), SE = c(0.111893590886356, 
+ 0.112522508873481, 0.148103743733873), df = c(5.22163854368496, 
+ 5.22163854368496, 5.22163854368496), lower.CL = c(2.10382917999276, 
+ 2.11565412905959, 2.78465437801484), upper.CL = c(2.87981160196529, 
+ 2.89599809934785, 3.81175432945472), .group = c("a", "a", "b"
+ )), row.names = c(1L, 3L, 2L), class = "data.frame")

创建情节：

plot.mixed.lme<-ggplot(cld.mixed_C_L,aes(x = managem,y=response,color= managem, label=.group))+ 
        theme_bw()+
        geom_point(shape  = 15, size   = 4) +
        geom_errorbar(aes(ymin  =  lower.CL,ymax  =  upper.CL),width =  0.2,size  =  0.7)+ 
        theme(aspect.ratio = 2/1) + 
#### following lines adds legend inside the boxplot:
        theme(legend.justification=c(1,0), legend.position=c(1,0),
        legend.direction="vertical",
        legend.box="vertical",
        legend.box.just = c("top"), 
        legend.background = element_rect(fill=alpha('white', 0.4)))+
        #removes legend:
        guides(fill = FALSE, color= FALSE) +
#### remove axis labels:
        theme(plot.title = element_blank(), axis.title.x = element_blank(), axis.title.y = element_blank()) +
#### move significance letters:
        geom_text(nudge_x = c(0.3, 0.3, 0.3),
                  nudge_y = c(0, 0,0),
                  color   = "black") +
#### set colours of the boxes:
        scale_color_manual(values = c("#333333", "#333333", "#333333"))+
        annotation_custom(my_grob)
### print three plots as example: 


plot.mixed.lme
plot.mixed.lme
plot.mixed.lme

最终 pdf 文档的结果如下所示：

我一直在想办法减少地块之间的 space，但到目前为止我还没有成功。感谢任何帮助。

非常感谢。

地块大小不匹配的问题

（见评论）

Answer 1

从块选项中删除 out.width = c("32%","32%","32%") 并使用 cowplot 的 plot_grid 函数，如下所示：

cowplot::plot_grid(plot.mixed.lme, plot.mixed.lme, plot.mixed.lme, nrow = 1)

在绘图 ggplot2 之间减少 space

Reduce space between plots ggplot2

grid

r

spacing

ggplot2

bookdown

创建情节：

地块大小不匹配的问题