在geom_tile()/ geom_raster()中标记特定的图块 [英] Marking specific tiles in geom_tile() / geom_raster()
问题描述
$ b $ $ p $
df < - matrix(rnorm(100),nrow = 10)
rownames(df)< - 字母[1:10]
熔化< - 熔化(df)
熔化$ na < - 错误
熔化[圆形(runif(10,0,100)),na] < - T
头(熔化)
Var1 Var2值不详
1 A 1 -0.2413015 FALSE
2 B 1 1.5077282 FALSE
3 C 1 -1.0798806 TRUE
4 D 1 2.0723791 FALSE
现在,我想使用ggplot和 mark 绘制具有 na = TRUE
的图块(或栅格) 。目前我将这些商标绘制为点:$ b
$ b pre $ g $ p $ ggplot熔化
geom_raster(aes(x = Var1,y = Var2,fill = value))+
scale_fill_gradient2(low =blue,high =red,na.value =black,name =)+
geom_point (aes(x = Var1,y = Var2,size = as.numeric(na)))
但是,我没有像这样的情节非常多,原因有两个:
- 即使
molten $ na = FALSE
。当然,我可以指定data = molten [molten $ na,]
,但实际上这应该是可能的,而不指定其他数据集。 我不喜欢这些要点,但宁愿在墙上穿过墙或边框。但我不知道如何做到这一点。如果我使用geom_segment()
作为条带,我将如何指定yend
和xend
?
任何帮助表示感谢。
编辑1
下面是 dput
的重现性:
结构(列表(Var1 =结构(c(1L,2L,3L,4L,1L,2L,3L,
4L,1L,2L,3L,4L,1L,2L,3L)标记= c(A,
B,C,D,E,F,G,4L, (6L,6L,6L,6L,7L,7L,7L,7L,8L,8L,8L,8L,8L,8L,8L) ,
9L,9L,9L,9L,10L,10L,10L,10L),值= C(-0.468920099229389,
0.996105987531978,-0.527496444770932,-0.767851702991822,
-0.36077954422072,-0.145335912847538 ,0.114951323188032,
0.644232124274217,0.9971443502096584,0.7774515290180507,
-0.436252398260595,-0.111174676975868,1.116095688943808,
0.44677656465583,-0.708779168274131,0.460296447139761,0.460296447139761,0
-0.4 75304748445917,-0.481548436194392,-1.66560630161765,
-2.06055347675196),NA = C(FALSE,FALSE,FALSE,FALSE,FALSE,
FALSE,FALSE,FALSE,TRUE,FALSE,FALSE,FALSE,FALSE, FALSE,
FALSE,FALSE,TRUE,FALSE,FALSE,FALSE)),.Names = c(Var1,
Var2,value,na),row.names = C(51L,52L,53L,54L,61L,
62L,63L,64L,71L,72L,73L,74L,81L,82L,83L,84L,91L,92L,
93L,94L) ,class =data.frame)
两种可能的方法:在示例1中,我使用了 ifelse
和 scale_size_manual
来控制点是否绘制在每个单元格中。在示例2中,我创建了一个小的辅助数据框,并使用 geom_rect
来绘制一个矩形而不是一个点。为了方便,我将Var2转换为因子。在ggplot2中,沿离散/因子轴的每个步长都是1.0。这可以方便地计算 geom_rect
的值。
#使用ggplot2版本0.9.2.1
库(ggplot2)
#原始帖子的测试数据集已被分配到'熔化'。
melt $ Var2 = factor(熔化的$ Var2)
#例子1.
p1 = ggplot(data = molten,aes(x = Var1,y = var2,fill = value))+
geom_raster()+
scale_fill_gradient2(low =blue,high =red,na.value =black,name =)+
geom_point(aes(size = ifelse(na,dot,no_dot)))+
scale_size_manual(values = c(dot = 6,no_dot = NA),guide =none)+
labs(title =Example 1)
ggsave(plot = p1,filename =plot_1.png,height = 3,width = 3.5)
#示例2.
#创建辅助数据框。
帧=熔化[熔化$ na,c(Var1,Var2)]
帧$ Var1 = as.integer(帧$ Var1)
帧$ Var2 = as.integer (帧$ VAR2)
P2 = ggplot(数据=熔融)+
geom_raster(AES(X = VAR1,Y = VAR2,填充=值))+
scale_fill_gradient2( low =blue,high =red,na.value =black,name =)+
geom_rect(data = frames,size = 1,fill = NA,color =black,
aes(xmin = Var1-0.5,xmax = Var1 + 0.5,ymin = Var2-0.5,ymax = Var2 + 0.5))+
labs(title =Example 2)
ggsave(plot = p2,filename =plot_2.png,height = 3,width = 3.5)
Let's say I have a data.frame like this:
df <- matrix( rnorm(100), nrow = 10)
rownames(df) <- LETTERS[1:10]
molten <- melt(df)
molten$na <- FALSE
molten[ round(runif(10, 0, 100 )), "na" ] <- T
head(molten)
Var1 Var2 value na
1 A 1 -0.2413015 FALSE
2 B 1 1.5077282 FALSE
3 C 1 -1.0798806 TRUE
4 D 1 2.0723791 FALSE
Now, I want to plot a tile (or raster) plot using ggplot and mark those tiles which have na=TRUE
. Currently I plot the marks as points:
g <- ggplot( molten ) +
geom_raster( aes( x = Var1, y = Var2, fill = value ) ) +
scale_fill_gradient2( low = "blue", high = "red", na.value="black", name = "" ) +
geom_point( aes( x = Var1, y = Var2, size= as.numeric(na) ) )
However, I don't like this plot very much for two reasons:
- There is still a point drawn even if
molten$na = FALSE
. Sure I could specifydata=molten[ molten$na, ]
, but actually this should be possible without specifying another data set. - I don't like the points, but would rather like to have frames around or stripes through the tiles. But I have no idea how to achieve this. If I would use
geom_segment()
for stripes, how would I specifyyend
andxend
?
Any help is appreciated.
Edit 1
Here is the dput
for reproducibility:
structure(list(Var1 = structure(c(1L, 2L, 3L, 4L, 1L, 2L, 3L,
4L, 1L, 2L, 3L, 4L, 1L, 2L, 3L, 4L, 1L, 2L, 3L, 4L), .Label = c("A",
"B", "C", "D", "E", "F", "G", "H", "I", "J"), class = "factor"),
Var2 = c(6L, 6L, 6L, 6L, 7L, 7L, 7L, 7L, 8L, 8L, 8L, 8L,
9L, 9L, 9L, 9L, 10L, 10L, 10L, 10L), value = c(-0.468920099229389,
0.996105987531978, -0.527496444770932, -0.767851702991822,
-0.36077954422072, -0.145335912847538, 0.114951323188032,
0.644232124274217, 0.971443502096584, 0.774515290180507,
-0.436252398260595, -0.111174676975868, 1.16095688943808,
0.44677656465583, -0.708779168274131, 0.460296447139761,
-0.475304748445917, -0.481548436194392, -1.66560630161765,
-2.06055347675196), na = c(FALSE, FALSE, FALSE, FALSE, FALSE,
FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE,
FALSE, FALSE, TRUE, FALSE, FALSE, FALSE)), .Names = c("Var1",
"Var2", "value", "na"), row.names = c(51L, 52L, 53L, 54L, 61L,
62L, 63L, 64L, 71L, 72L, 73L, 74L, 81L, 82L, 83L, 84L, 91L, 92L,
93L, 94L), class = "data.frame")
Here are two possible approaches:
In Example 1, I used ifelse
and scale_size_manual
to control whether a point is plotted in each cell.
In Example 2, I created a small auxiliary data.frame and used geom_rect
to plot a rectangle instead of a dot. For convenience, I converted Var2 to factor. In ggplot2, each step along a discrete/factor axis is length 1.0. This allows easy computation of the values for geom_rect
.
# Using ggplot2 version 0.9.2.1
library(ggplot2)
# Test dataset from original post has been assigned to 'molten'.
molten$Var2 = factor(molten$Var2)
# Example 1.
p1 = ggplot(data=molten, aes(x=Var1, y=Var2, fill=value)) +
geom_raster() +
scale_fill_gradient2(low="blue", high="red", na.value="black", name="") +
geom_point(aes(size=ifelse(na, "dot", "no_dot"))) +
scale_size_manual(values=c(dot=6, no_dot=NA), guide="none") +
labs(title="Example 1")
ggsave(plot=p1, filename="plot_1.png", height=3, width=3.5)
# Example 2.
# Create auxiliary data.frame.
frames = molten[molten$na, c("Var1", "Var2")]
frames$Var1 = as.integer(frames$Var1)
frames$Var2 = as.integer(frames$Var2)
p2 = ggplot(data=molten) +
geom_raster(aes(x=Var1, y=Var2, fill=value)) +
scale_fill_gradient2(low="blue", high="red", na.value="black", name="") +
geom_rect(data=frames, size=1, fill=NA, colour="black",
aes(xmin=Var1 - 0.5, xmax=Var1 + 0.5, ymin=Var2 - 0.5, ymax=Var2 + 0.5)) +
labs(title="Example 2")
ggsave(plot=p2, filename="plot_2.png", height=3, width=3.5)
这篇关于在geom_tile()/ geom_raster()中标记特定的图块的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!