9
我想将一个很长的图例分成两列,并且我没有任何成功。这里是我使用的代码,其他地方找不到的解决方案不适用于geom='area'
,虽然它适用于我的其他地块。我从下面的代码得到的情节如下所示:如何将ggplot2图例分成两列用于区域图
那么我该如何绘制Q1
两列中的图例呢?
NVER <- 10
NGRID <- 20
MAT <- matrix(NA, nrow=NVER, ncol=NGRID)
gsd <- 0.1 # standard deviation of the Gaussians
verlocs <- seq(from=0, to=1, length.out=NVER)
thegrid <- seq(from=0, to=1, length.out=NGRID)
# create a mixture of Gaussians with modes spaced evenly on 0 to 1
# i.e. the first mode is at 0 and the last mode is at 1
for (i in 1:NVER) {
# add the shape of gaussian i
MAT[i,] <- dnorm(thegrid, verlocs[[i]], sd=gsd)
}
M2 <- MAT/rowSums(MAT)
colnames(M2) <- as.character(thegrid)
# rownames(M2) <- as.character(verlocs)
library(reshape2)
D2 <- melt(M2)
# head(D2)
# str(D2)
D2$Var1 <- ordered(D2$Var1)
library(ggplot2)
Q1 <- qplot(Var2, value, data=D2, order=Var1, fill=Var1, geom='area')
Q1
# ggsave('sillyrainbow.png')
# now try the stackoverflow guide() solution
Q1 + guides(col=guide_legend(ncol=2)) # try but fail to put the legend in two columns!
请注意,creating columns within a legend list while using ggplot in R code中的解决方案已合并到上面,它不能工作不幸!