问题描述
这个问题的动机是进一步探索这个。如果每个方面的条纹数量存在较大差异，那么接受解决方案的问题就会变得更加明显。使用该解决方案查看此数据和结果图：
This question is motivated by further exploring this question. The problem with the accepted solution becomes more obvious when there is a greater disparity in the number of bars per facet. Take a look at this data and the resultant plot using that solution:
# create slightly contrived data to better highlight width problems
data <- data.frame(ID=factor(c(rep(1,9), rep(2,6), rep(3,6), rep(4,3), rep(5,3))),
TYPE=factor(rep(1:3,length(ID)/3)),
TIME=factor(c(1,1,1,2,2,2,3,3,3,1,1,1,2,2,2,1,1,1,2,2,2,1,1,1,1,1,1)),
VAL=runif(27))
# implement previously suggested solution
base.width <- 0.9
data$w <- base.width
# facet two has 3 bars compared to facet one's 5 bars
data$w[data$TIME==2] <- base.width * 3/5
# facet 3 has 1 bar compared to facet one's 5 bars
data$w[data$TIME==3] <- base.width * 1/5
ggplot(data, aes(x=ID, y=VAL, fill=TYPE)) +
facet_wrap(~TIME, ncol=1, scale="free") +
geom_bar(position="stack", aes(width = w),stat = "identity") +
coord_flip()
您会注意到宽度看起来完全正确，但方面3中的空白非常明显。有没有简单的方法来解决这个ggplot2，我已经看到了（facet_wrap没有空间选项）。
You'll notice the widths look exactly right, but the whitespace in facet 3 is quite glaring. There is no easy way to fix this in ggplot2 that I have seen yet (facet_wrap does not have a space option).
下一步是尝试使用gridExtra解决这个问题：
Next step is to try to solve this using gridExtra:
# create each of the three plots, don't worry about legend for now
p1 <- ggplot(data[data$TIME==1,], aes(x=ID, y=VAL, fill=TYPE)) +
facet_wrap(~ TIME, ncol=1) +
geom_bar(position="stack", show_guide=FALSE) +
coord_flip()
p2 <- ggplot(data[data$TIME==2,], aes(x=ID, y=VAL, fill=TYPE)) +
facet_wrap(~ TIME, ncol=1) +
geom_bar(position="stack", show_guide=FALSE) +
coord_flip()
p3 <- ggplot(data[data$TIME==3,], aes(x=ID, y=VAL, fill=TYPE)) +
facet_wrap(~ TIME, ncol=1) +
geom_bar(position="stack", show_guide=FALSE) +
coord_flip()
# use similar arithmetic to try and get layout correct
require(gridExtra)
heights <- c(5, 3, 1) / sum(5, 3, 1)
print(arrangeGrob(p1 ,p2, p3, ncol=1,
heights=heights))
你会注意到我使用了前面建议的基于每个方面条数的相同算术，但在这种情况下，它最终会出现可怕的错误。这似乎是因为在数学中我需要考虑额外的恒定高度元素。
You'll notice I used the same arithmetic previously suggested based off the number of bars per facet, but in this case it ends up horribly wrong. This seems to be because there are extra "constant height" elements that I need to take into consideration in the math.
另一个复杂因素（我相信）是最终输出（以及宽度是否匹配）还将取决于输出位置的宽度和高度无论是在R / RStudio环境中，还是在PNG文件中。
Another complication (I believe) is that the final output (and whether or not the widths match) will also depend on the width and height of where I'm outputting the final grob to, whether its in a R/RStudio environment, or to a PNG file.
我怎么做到这一点？
How can I accomplish this?
推荐答案
类似这样的东西看起来可行，但它并不完全。它具有工作的外观，因为ID因子的级别是连续的。还有其他的， scale =free失败。但有可能进一步发展。该方法使用 facet_grid ，因此可以使用 space =free。该方法使用geom_rect将不同颜色的矩形叠放在一起。它需要计算累计和，以便可以定位每个矩形的右侧边缘。
Something like this appear to work, but it doesn't - not completely. It has the appearance of working because the levels of the ID factor are sequential. Anything else, and scale = "free" fails. But it might be possible to develop further. The method uses facet_grid, and thus space = "free" can be used. The method uses geom_rect to layer differently coloured rectangles on top of each other. It needs cumulative sums to be calculated so that the right-hand edge of each rectangle can be positioned.
data <- data.frame(ID=factor(c(rep(1,9), rep(2,6), rep(3,6), rep(4,3), rep(5,3))),
TYPE=factor(rep(1:3,3)),
TIME=factor(c(1,1,1,2,2,2,3,3,3,1,1,1,2,2,2,1,1,1,2,2,2,1,1,1,1,1,1)),
VAL=runif(27))
library(ggplot2)
library(plyr)
# Get the cumulative sums
data = ddply(data, .(ID, TIME), mutate, CUMSUMVAL = cumsum(VAL))
ggplot(data, aes(x=VAL, y = as.numeric(ID), fill=TYPE)) +
geom_rect(data = subset(data, TYPE == 3), aes(xmin = 0, xmax = CUMSUMVAL, ymin = as.numeric(ID)-.2, ymax = as.numeric(ID)+.2)) +
geom_rect(data = subset(data, TYPE == 2), aes(xmin = 0, xmax = CUMSUMVAL, ymin = as.numeric(ID)-.2, ymax = as.numeric(ID)+.2)) +
geom_rect(data = subset(data, TYPE == 1), aes(xmin = 0, xmax = CUMSUMVAL, ymin = as.numeric(ID)-.2, ymax = as.numeric(ID)+.2)) +
facet_grid(TIME~., space = "free", scale="free") +
scale_y_continuous(breaks = c(1:5), expand = c(0, 0.2))
编辑：或者真的粗线条工作得更好一些（我认为）
OR really thick lines work a little better (I think)
ggplot(data, aes(x=VAL, y = ID, colour=TYPE)) +
geom_segment(data = subset(data, TYPE == 3), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 2), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 1), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
facet_grid(TIME~., space = "free", scale="free")
其他修改从您的earleir文章中提取数据并稍加修改。
已更新 opts 已弃用;使用主题来代替。
Additional Edit Taking the data from your earleir post, and modifying it a little.
Updated opts is deprecated; using theme instead.
df <- structure(list(ID = structure(c(1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L,
2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 4L, 4L, 4L, 4L, 4L, 5L,
5L, 5L, 5L, 5L, 5L, 6L, 6L, 6L, 6L, 6L, 6L, 7L, 7L, 7L), .Label = c("a",
"b", "c", "d", "e", "f", "g"), class = "factor"), TYPE = structure(c(1L,
2L, 3L, 4L, 5L, 1L, 2L, 3L, 4L, 5L, 6L, 1L, 2L, 3L, 4L, 5L, 6L,
1L, 2L, 3L, 4L, 5L, 6L, 1L, 2L, 3L, 4L, 5L, 6L, 1L, 2L, 3L, 4L,
5L, 6L, 1L, 2L, 3L), .Label = c("1", "2", "3", "4", "5", "6",
"7", "8"), class = "factor"), TIME = structure(c(2L, 2L, 2L,
2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L,
2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 3L, 3L, 3L, 3L, 3L, 3L,
1L, 1L, 1L), .Label = c("One", "Five", "Fifteen"), class = "factor"), VAL = c(0.937377670081332,
0.522220720537007, 0.278690102742985, 0.967633064137772, 0.116124767344445,
0.0544306698720902, 0.470229141646996, 0.62017166428268, 0.195459847105667,
0.732876230962574, 0.996336271753535, 0.983087373664603, 0.666449476964772,
0.291554537601769, 0.167933790013194, 0.860138458199799, 0.172361251665279,
0.833266809117049, 0.620465772924945, 0.786503327777609, 0.761877260869369,
0.425386636285111, 0.612077651312575, 0.178726130630821, 0.528709076810628,
0.492527724476531, 0.472576208412647, 0.0702785139437765, 0.696220921119675,
0.230852259788662, 0.359884874196723, 0.518227979075164, 0.259466265095398,
0.149970305617899, 0.00682218233123422, 0.463400925742462, 0.924704828299582,
0.229068386601284)), .Names = c("ID", "TYPE", "TIME", "VAL"), row.names = c(NA,
-38L), class = "data.frame")
library(ggplot2)
library(plyr)
data = ddply(df, .(ID, TIME), mutate, CUMSUMVAL = cumsum(VAL))
ggplot(data, aes(x=VAL, y = ID, colour=TYPE)) +
geom_segment(data = subset(data, TYPE == 6), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 5), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 4), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 3), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 2), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
geom_segment(data = subset(data, TYPE == 1), aes(x = 0, xend = CUMSUMVAL, y = ID, yend = ID), size = 10) +
facet_grid(TIME~., space = "free", scale="free") +
theme(strip.text.y = element_text(angle = 0))
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