我花了很多时间试图将 11 个图形放在一个图中并使用 gridExtra
排列它们,但我失败了,所以我求助于您,希望您能提供帮助。
我有 11 种钻石分类(称为 size1
)和其他 11 种分类( size2
),我想绘制每增加 size1
和增加 clarity
(从 1 到 07914 的钻石图从 1 增加到 6104)的中间价格如何变化同一图中的所有 11 个图。
我尝试按照其他帖子的建议使用 size2
,但图例远离右侧,所有图形都向左压扁,您能帮我弄清楚如何指定 gridExtra
中图例的“宽度”吗?我找不到任何好的解释。非常感谢您的帮助,我真的很感激...
我一直试图找到一个很好的例子来重新创建我的数据框,但也失败了。我希望这个数据框有助于理解我想要做什么,我无法让它工作并且与我的一样,并且一些图没有足够的数据,但重要的部分是使用 gridExtra
(虽然如果您对其他部分有其他意见,请告诉我):
library(ggplot2)
library(gridExtra)
df <- data.frame(price=matrix(sample(1:1000, 100, replace = TRUE), ncol = 1))
df$size1 = 1:nrow(df)
df$size1 = cut(df$size1, breaks=11)
df=df[sample(nrow(df)),]
df$size2 = 1:nrow(df)
df$size2 = cut(df$size2, breaks=11)
df=df[sample(nrow(df)),]
df$clarity = 1:nrow(df)
df$clarity = cut(df$clarity, breaks=6)
# Create one graph for each size1, plotting the median price vs. the size2 by clarity:
for (c in 1:length(table(df$size1))) {
mydf = df[df$size1==names(table(df$size1))[c],]
mydf = aggregate(mydf$price, by=list(mydf$size2, mydf$clarity),median);
names(mydf)[1] = 'size2'
names(mydf)[2] = 'clarity'
names(mydf)[3] = 'median_price'
assign(paste("p", c, sep=""), qplot(data=mydf, x=as.numeric(mydf$size2), y=mydf$median_price, group=as.factor(mydf$clarity), geom="line", colour=as.factor(mydf$clarity), xlab = "number of samples", ylab = "median price", main = paste("region number is ",c, sep=''), plot.title=element_text(size=10)) + scale_colour_discrete(name = "clarity") + theme_bw() + theme(axis.title.x=element_text(size = rel(0.8)), axis.title.y=element_text(size = rel(0.8)) , axis.text.x=element_text(size=8),axis.text.y=element_text(size=8) ))
}
# Couldnt get some to work, so use:
p5=p4
p6=p4
p7=p4
p8=p4
p9=p4
# Use gridExtra to arrange the 11 plots:
g_legend<-function(a.gplot){
tmp <- ggplot_gtable(ggplot_build(a.gplot))
leg <- which(sapply(tmp$grobs, function(x) x$name) == "guide-box")
legend <- tmp$grobs[[leg]]
return(legend)}
mylegend<-g_legend(p1)
grid.arrange(arrangeGrob(p1 + theme(legend.position="none"),
p2 + theme(legend.position="none"),
p3 + theme(legend.position="none"),
p4 + theme(legend.position="none"),
p5 + theme(legend.position="none"),
p6 + theme(legend.position="none"),
p7 + theme(legend.position="none"),
p8 + theme(legend.position="none"),
p9 + theme(legend.position="none"),
p10 + theme(legend.position="none"),
p11 + theme(legend.position="none"),
main ="Main title",
left = ""), mylegend,
widths=unit.c(unit(1, "npc") - mylegend$width, mylegend$width), nrow=1)
最佳答案
我不得不改变 qplot
稍微循环调用(即将因子放入数据框中),因为它引发了大小不匹配的错误。我不包括那一点,因为那部分显然在你的环境中工作,或者它是一个错误的粘贴。
尝试调整您的 widths
像这样的单位:
widths=unit(c(1000,50),"pt")
你会得到一些更接近你可能期望的东西:
而且,我可以在几个月后粘贴代码:-)
library(ggplot2)
library(gridExtra)
df <- data.frame(price=matrix(sample(1:1000, 100, replace = TRUE), ncol = 1))
df$size1 = 1:nrow(df)
df$size1 = cut(df$size1, breaks=11)
df=df[sample(nrow(df)),]
df$size2 = 1:nrow(df)
df$size2 = cut(df$size2, breaks=11)
df=df[sample(nrow(df)),]
df$clarity = 1:nrow(df)
df$clarity = cut(df$clarity, breaks=6)
# Create one graph for each size1, plotting the median price vs. the size2 by clarity:
for (c in 1:length(table(df$size1))) {
mydf = df[df$size1==names(table(df$size1))[c],]
mydf = aggregate(mydf$price, by=list(mydf$size2, mydf$clarity),median);
names(mydf)[1] = 'size2'
names(mydf)[2] = 'clarity'
names(mydf)[3] = 'median_price'
mydf$clarity <- factor(mydf$clarity)
assign(paste("p", c, sep=""),
qplot(data=mydf,
x=as.numeric(size2),
y=median_price,
group=clarity,
geom="line", colour=clarity,
xlab = "number of samples",
ylab = "median price",
main = paste("region number is ",c, sep=''),
plot.title=element_text(size=10)) +
scale_colour_discrete(name = "clarity") +
theme_bw() + theme(axis.title.x=element_text(size = rel(0.8)),
axis.title.y=element_text(size = rel(0.8)),
axis.text.x=element_text(size=8),
axis.text.y=element_text(size=8) ))
}
# Use gridExtra to arrange the 11 plots:
g_legend<-function(a.gplot){
tmp <- ggplot_gtable(ggplot_build(a.gplot))
leg <- which(sapply(tmp$grobs, function(x) x$name) == "guide-box")
legend <- tmp$grobs[[leg]]
return(legend)}
mylegend<-g_legend(p1)
grid.arrange(arrangeGrob(p1 + theme(legend.position="none"),
p2 + theme(legend.position="none"),
p3 + theme(legend.position="none"),
p4 + theme(legend.position="none"),
p5 + theme(legend.position="none"),
p6 + theme(legend.position="none"),
p7 + theme(legend.position="none"),
p8 + theme(legend.position="none"),
p9 + theme(legend.position="none"),
p10 + theme(legend.position="none"),
p11 + theme(legend.position="none"),
top ="Main title",
left = ""), mylegend,
widths=unit(c(1000,50),"pt"), nrow=1)
编辑 (16/07/2015): 与
gridExtra
>= 2.0.0,main
参数已重命名 top
.
关于r - 使用 gridExtra 排列许多图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14920662/