R中的多图饼图

Question

以下代码修改自较早的 post 生成包含饼图的图表 window。我希望能够在 window 中放置多个饼图，但在放置时遇到了问题。对饼图函数的连续调用不会按照我期望的顺序填充图（两个饼图放在图的对角，然后进一步调用不会再添加任何饼图，即使有 space).有什么办法可以纠正这个问题吗？我最终需要 6 个饼图（3 行和 2 列）。

rm(list = ls(all = TRUE))

# DATA
mydf <- structure(list(inner_category = structure(c(3L, 3L, 3L, 3L, 2L, 2L, 
  2L, 1L, 5L, 5L, 4L), .Label = c("group1", "group2", "group3", 
  "group4", "group5"), class = "factor"), outer_category = structure(c(5L, 
  6L, 7L, 8L, 2L, 3L, 4L, 1L, 10L, 11L, 9L), .Label = c("group1_A", 
  "group1_B", "group1_C", "group1_D", "group2_A", "group2_B", 
  "group2_C", "group2_D", "group3_A", "group4_A", "group4_B"), 
  class = "factor"), share = c(10.85, 7.35, 33.06, 2.81, 1.58, 
  13.12, 5.43, 9.91, 1.42, 4.55, 1.65)), .Names = c("inner_category", "outer_category", "share"),
  row.names = c(NA, -11L), class = "data.frame")

mydf$total <- with(mydf1, ave(share, inner_category, FUN = sum))

# PLOTTING WINDOW
quartz("Quartz", width=9, height=8, pointsize=18)
par(mfrow=c(3,2), mar=c(4,4,2,0.5), mgp = c(1.5, 0.3, 0), tck = -0.01)

#FUNCTION
donutplotfunction <- function(myfile, width = 15, height = 11) { 

    ## HOUSEKEEPING
    if (missing(myfile)) file <- getwd()
    op <- par(no.readonly = TRUE); on.exit(par(op))

    nr <- nrow(myfile)
    width <- max(sqrt(myfile$share)) / 0.8

    tbl <- with(myfile, table(inner_category)[order(unique(inner_category))])
    cols <- c('cyan2','red','orange','green','dodgerblue2')
    cols <- unlist(Map(rep, cols, tbl))

    ## LOOP TO CREATE PIE SLICES
    par(omi = c(0.5,0.5,0.75,0.5), mai = c(0.1,0.1,0.1,0.1), las = 1)
    for (i in 1:nr) {
    par(new = TRUE)

    ## CREATE COLORS AND SHADES
    rgb <- col2rgb(cols[i])
    f0 <- rep(NA, nr)
    f0[i] <- rgb(rgb[1], rgb[2], rgb[3], 190 / sequence(tbl)[i], maxColorValue = 255)

    ## CREATE LABELS FOR THE OUTERMOST SECTION
    lab <- with(myfile, sprintf('%s: %s', outer_category, share))
    if (with(myfile, share[i] == max(share))) {
      lab0 <- lab
    } else lab0 <- NA

    ## PLOT THE OUTSIDE PIE AND SHADES OF SUBGROUPS
    par(lwd = 0.1)
    pie(myfile$share, border = "white", radius = 5 / width, col = f0, labels = lab0, cex = 0.7, ticks = 0)

    ## REPEAT ABOVE FOR THE MAIN GROUPS
    par(new = TRUE)
    rgb <- col2rgb(cols[i])
    f0[i] <- rgb(rgb[1], rgb[2], rgb[3], maxColorValue = 255)
    par(lwd = 0.1)
    pie(myfile$share, border = "white", radius = 4 / width, col = f0, labels = NA)
    }

    ## GRAPH TITLE
    text(x = c(-.05, -.05, 0.15, .25, .3), y = c(.08, -.12, -.15, -.08, -.02), labels = unique(myfile$inner_category), col = 'black', cex = 0.8)
    mtext('Figure Main Title', side = 3, line = -1, adj = 0, cex = 1, outer = TRUE)
}

donutplotfunction(mydf)

Answer 1

首先，有几个提示。 (1) 如果你 post a minimal example，人们更容易提供帮助。您的代码有很多与问题无关的细节——尝试消除此类代码。 (2) 由于rgb是函数名，尽量避免使用rgb作为变量名。 (3) 您不需要遍历饼图切片——只需让 R 一次绘制所有切片即可。 (4) 您的 par(new=TRUE) 语句过多。

我觉得下面的代码就是你想要的精华。

mydf <- structure(list(inner_category = structure(c(3L, 3L, 3L, 3L, 2L, 2L, 
2L, 1L, 5L, 5L, 4L), .Label = c("group1", "group2", "group3", 
"group4", "group5"), class = "factor"), outer_category = structure(c(5L, 
6L, 7L, 8L, 2L, 3L, 4L, 1L, 10L, 11L, 9L), .Label = c("group1_A", 
"group1_B", "group1_C", "group1_D", "group2_A", "group2_B", 
"group2_C", "group2_D", "group3_A", "group4_A", "group4_B"), 
class = "factor"), share = c(10.85, 7.35, 33.06, 2.81, 1.58, 
13.12, 5.43, 9.91, 1.42, 4.55, 1.65)), .Names = c("inner_category", "outer_category", "share"),
row.names = c(NA, -11L), class = "data.frame")

donutplotfunction <- function(myfile, width = 7) { 

  tbl <- with(myfile, table(inner_category)[order(unique(inner_category))])
  cols <- c('cyan2','red','orange','green','dodgerblue2')
  cols <- unlist(Map(rep, cols, tbl))  
  rg <- col2rgb(cols)
  col.lt <- rgb(rg[1,], rg[2,], rg[3,], alpha = 190 / sequence(tbl), maxColorValue = 255)
  col.dk <- rgb(rg[1,], rg[2,], rg[3,], maxColorValue = 255)

  # Outside pie
  pie(myfile$share, border = "white", radius = 5 / width, col = col.lt, cex = 0.7)
  # Inside pie.  Use 'new' to get overplotting
  par(new = TRUE)
  pie(myfile$share, border = "white", radius = 4 / width, col = col.dk, labels = NA)

}

#windows()
par(mfrow=c(3,2), mar=c(4,4,2,0.5), mgp = c(1.5, 0.3, 0), tck = -0.01)

donutplotfunction(mydf)
donutplotfunction(mydf)
donutplotfunction(mydf) # etc

R中的多图饼图

Multiple plot piechart in R

r

pie-chart