本文介绍了与多个顶部相等的间距的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 限时删除!! 我试图在一个 ggplot2 图表中创建一个图例,每行有多行和一个参数和值。由于我有符号作为变量,所以需要使用表达式来完成。为了创建新的线条,我使用了多个 atop 命令,但这会导致最后一行中的间距不均匀。请看下面的例子: library(ggplot2) N = 25 a = -5 b = 2 sigma = 1 x = runif(N,0,10)y = a + x * b + rnorm(N ,sd = sigma) df = data.frame(x,y) ggplot(df,aes(x,y))+ geom_point() + geom_label(aes(x = 1,y = max(y) - 2), label = paste0(atop(atop(,textstyle(a ==, a,,textstyle(b ==,b,)),,textstyle(sigma ==,sigma,))) ,parse = TRUE ) ggsave(plotmath_atop.png,width = 6,height = 4,scale = 1) 这给出以下图表: 正如您所看到的,行之间的间距 b = 2 和 \sigma = 1 显着大于 a = -5 和 b = 2 。 有没有一种方法可以在使用多行换行的情况下使用表达式,而每行之间仍然有间距?解决方案您可以使用gridExtra :: tableGrob, library(gridExtra)库(网格) table_label< - function(label,params = list()){ params< - modifyList(list(hjust = 0,x = 0),params) mytheme -ttheme_minimal(padding = unit(c(1,1),mm), core = list(fg_params = params),parse = TRUE) disect m< - as.matrix(disect) tg< - tableGrob(m,theme = mytheme) BG < - roundrectGrob(width = sum(tg $ widths)+ unit(3,mm),height = sum(tg $ heights)+ unit(3,mm)) grobTree(bg,tg ) } txt b == 2\ $ sigma == 1' library(ggplot2) qplot(1:10,1:10)+ annotation_custom(table_label(txt),xmin = 0, xmax = 5,ymin = 7.5) I'm trying to create a legend in a ggplot2 graph with multiple lines and a parameter and value on each line. Since I have symbols as variables, this needs to be done with expression. To create new lines, I have used multiple atop commands, but this leads to uneven spacing in the final line. Please see my following example:library(ggplot2)N = 25a = -5b = 2sigma = 1x = runif(N, 0, 10)y = a + x * b + rnorm(N, sd = sigma)df = data.frame(x, y)ggplot(df, aes(x, y)) + geom_point() + geom_label(aes(x = 1, y = max(y) - 2), label = paste0("atop(atop(", "textstyle(a == ", a, "),", "textstyle(b == ", b, ")),", "textstyle(sigma == ", sigma, "))" ), parse = TRUE )ggsave("plotmath_atop.png", width = 6, height = 4, scale = 1)This gives the following plot:As you can see, the spacing between the lines b=2 and \sigma=1 is noticeably larger than the spacing between the lines a=-5 and b=2.Is there a way of using expression with multiple line breaks while still having even spacing between each line? 解决方案 you could use gridExtra::tableGrob,library(gridExtra)library(grid)table_label <- function(label, params=list()) { params <- modifyList(list(hjust=0, x=0), params) mytheme <- ttheme_minimal(padding=unit(c(1, 1), "mm"), core = list(fg_params = params), parse=TRUE) disect <- strsplit(label, "\\n")[[1]] m <- as.matrix(disect) tg <- tableGrob(m, theme=mytheme) bg <- roundrectGrob(width = sum(tg$widths) + unit(3, "mm"), height = sum(tg$heights) + unit(3, "mm")) grobTree(bg, tg)}txt <- 'a == -5\n b == 2\n sigma == 1'library(ggplot2)qplot(1:10,1:10) + annotation_custom(table_label(txt), xmin=0, xmax=5, ymin=7.5) 这篇关于与多个顶部相等的间距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! 1403页,肝出来的.. 09-08 18:45