Beside = F在R的子图中的barplot中不起作用

Question

我正在尝试通过此页上的代码制作堆叠的barplot： 在地图上绘制的条

但是下面包含next = FALSE的代码仍然绘制并排的条形图，而不是堆叠的条形图。

ddf = read.table(header=T, sep=",", text="
country, val1, val2, val3
Nigeria,5,10,8
China,8,12,20
Brazil,15,9,20
Italy,9,25,5
Australia,15,5,25
")

require (rworldmap)

sPDF <- joinCountryData2Map(ddf
    , joinCode = "NAME"
    , nameJoinColumn = "country"
    , verbose = TRUE)


plot(getMap())
df <- merge(x=ddf, y=sPDF@data[sPDF@data$ADMIN, c("ADMIN", "LON", "LAT")], by.x="country", by.y="ADMIN", all.x=TRUE)
require(TeachingDemos)
for (i in 1:nrow(df)) 
  subplot(barplot(height=as.numeric(as.character(unlist(df[i, 2:4], use.names=F))), 
                  axes=F, beside=FALSE,
                  col=rainbow(3), ylim=range(df[,2:4])),
          x=df[i, 'LON'], y=df[i, 'LAT'], size=c(.3, .3))
legend("topright", legend=names(df[, 2:4]), fill=rainbow(3))

可能是什么原因，我该如何解决？

Answer 1

为了使工作正常， hight必须是具有1列的矩阵。 因此，请尝试：

plot(getMap())
df <- merge(x=ddf, y=sPDF@data[sPDF@data$ADMIN, c("ADMIN", "LON", "LAT")], by.x="country", by.y="ADMIN", all.x=TRUE)
require(TeachingDemos)
for (i in 1:nrow(df))
  height <- matrix(as.numeric(as.character(unlist(df[i, 2:4], use.names=F))), ncol=1)
  subplot(barplot(height=height, 
                  axes=F, beside=FALSE,
                  col=rainbow(3), ylim=range(df[,2:4])),
          x=df[i, 'LON'], y=df[i, 'LAT'], size=c(.3, .3))
legend("topright", legend=names(df[, 2:4]), fill=rainbow(3))