使用真棒 ggplot
包,我想要一个条形图,其中 fill
美学被映射到一个连续变量,实际上是 qvalues 和在它上面的纹理,实际上是条纹和交叉影线。
颜色渐变很重要,因为它代表了重要性,而纹理将显示类别“A”、“B”及其重叠。所以对角线以一种方式,相反的方式和交叉阴影分别。
我知道维恩图可以完成这项工作,但我们有 35 个样本,我认为比较会更容易看到。fill
是微不足道的,但是,质地很棘手。在 SO 上,感谢 @baptise (参见 here 和 here )我设法用虚拟数据获得了这个输出:
问题是 透明度十字架的背景。如果可能,请获取 alpha
在 grid.patternFill()
中处理背景功能会很棒。不幸的是,在我手中它不起作用。
任何帮助都感激不尽。
虚拟数据可以在这里加载:
dfso <- structure(list(Sample = c("S1", "S2", "S1", "S2", "S1", "S2"),
qvalue = c(14.704287341, 8.1682824035, 13.5471896224, 6.71158432425,
12.3900919038, 5.254886245), type = structure(c(1L, 1L, 2L,
2L, 3L, 3L), .Label = c("A", "overlap", "B"), class = "factor"),
value = c(897L, 1082L, 503L, 219L, 388L, 165L)), class = c("tbl_df",
"tbl", "data.frame"), row.names = c(NA, -6L), .Names = c("Sample",
"qvalue", "type", "value"))
代码在这里:
library("ggplot2")
library("gridSVG")
library("gridExtra")
library("dplyr")
library("RColorBrewer")
cols <- brewer.pal(7,"YlOrRd")
pso <- ggplot(dfso)+
geom_bar(aes(x = Sample, y = value, fill = qvalue, linetype = type), width = .8, colour = "black", stat = "identity", position = "stack", alpha = 1)+
theme_classic(18)+
theme( panel.grid.major = element_line(colour = "grey80"),
panel.grid.major.x = element_blank(),
panel.grid.minor = element_blank(),
legend.key = element_blank(),
axis.text.x = element_text(angle = 90, vjust = 0.5))+
guides(linetype = FALSE) +
ylab("Count")+
scale_fill_gradientn("-log10(qvalue)", colours = cols, limits = c(0, 20))+
scale_linetype_manual(values = c("dotted", "solid", "dotted"))+
scale_y_continuous(expand = c(0, 0), limits = c(0, 2000))
# gridSVG
pat1 <- pattern(linesGrob(gp = gpar(col="black", lwd = 1)),
width = unit(5, "mm"), height = unit(5, "mm"),
dev.width = 1, dev.height = 1)
pat2 <- pattern(linesGrob(x = unit(0:1, "npc"), y = unit(1:0, "npc"),
gp = gpar(col="black", lwd = 1)),
width = unit(5, "mm"), height = unit(5, "mm"),
dev.width = 1, dev.height = 1)
crossGrob <- gTree(children = gList(linesGrob(gp = gpar(col="black", lwd = 1)), linesGrob(x = unit(0:1, "npc"), y = unit(1:0, "npc"), gp = gpar(col="black", lwd = 1))))
registerPatternFill("hash1", pat1)
registerPatternFill("hash2", pat2)
registerPatternFill("cross", grob = crossGrob, dev.width = 1, dev.height = 1, width = unit(5, "mm"), height = unit(5, "mm"))
gridsvg("crossbars.svg", width = 10)
print(pso)
grid.force()
grid.patternFill("geom_rect.rect", alpha = 0.2, grep = TRUE, group = FALSE,
label = rep(c("hash1", "cross", "hash2"), 1))
dev.off()
在
grid.patternFill
alpha
参数假设提供透明度,据我所知。但是,它没有效果,并且失去了颜色。我只为第一个小节填充了图案,因此您可以看到对比。编辑 :
alpha
工作正常,但它作用于模式本身,即线条。这就解释了为什么这些线条看起来如此苍白。问题更在于背景被假定为白色且不透明。linetype
映射试图突出重叠部分,但这并不好。如果透明度适用于 gridSVG
我将丢弃这部分并一直保持实线。提前谢谢了,
奥雷连
如果有任何用处,输出
sessionInfo()
:R version 3.2.1 (2015-06-18)
Platform: x86_64-apple-darwin14.3.0 (64-bit)
Running under: OS X 10.10.4 (Yosemite)
locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] grid stats graphics grDevices utils datasets methods base
other attached packages:
[1] gridExtra_0.9.1 RColorBrewer_1.1-2 dplyr_0.4.1 gridSVG_1.4-3 ggplot2_1.0.1
loaded via a namespace (and not attached):
[1] Rcpp_0.11.6 XML_3.98-1.3 assertthat_0.1 digest_0.6.8 MASS_7.3-42 plyr_1.8.3 DBI_0.3.1
[8] gtable_0.1.2 magrittr_1.5 scales_0.2.5 stringi_0.5-5 reshape2_1.4.1 labeling_0.3 proto_0.3-10
[15] RJSONIO_1.3-0 tools_3.2.1 stringr_1.0.0 munsell_0.4.2 parallel_3.2.1 colorspace_1.2-6
最佳答案
我正在回答我自己的问题,因为有了这个 link,有一种方法可以为图案填充特定颜色.
在第一个栏上,对于类别“A”,它可能如下所示:
更换 pat1
模式由以下代码:
pat1 <- pattern(gTree(children=gList(
rectGrob(gp=gpar(col=NA, fill=cols[4])),
linesGrob(gp=gpar(col="black", lwd = 5)))),
width = unit(5, "mm"), height = unit(5, "mm"),
dev.width = 1, dev.height = 1)
对于
geom_bar
颜色很少,它会起作用,但对于我的问题,fill
颜色映射到热图比例,这将是乏味的。
关于r - geom_bar : color gradient and cross hatches (using gridSVG), 透明度问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31342379/