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我正在尝试在地图上的特定坐标上绘制玫瑰图/圆形直方图,类似于在包中的地图上绘制饼图mapplots

下面是一个生成的示例mapplots(代码见下文),我想用玫瑰图替换饼图

示例图

该软件包circular允许我绘制玫瑰图,但我无法将其与mapplots软件包集成。对实现此目的的替代包或代码有什么建议吗?

针对制作地图的代码的问题。这一切都基于mapplots包。我下载了地图的 shapefile(我认为来自http://www.freegisdata.org/

library(mapplots)
library(shapefiles)

xlim = c(-180, 180)
ylim = c(-90, 90)

#load shapefile
wmap = read.shapefile ("xxx")

# define x,y,z for pies
x <- c(-100, 100)
y <- c(50, -50)
z1 <- c(0.25, 0.25, 0.5)
z2 <- c(0.5, 0.2, 0.3)
z <- rbind(z1,z2)
# define radii of the pies
r <- c(5, 10)

# it's easier to have all data in a single df

plot(NA, xlim = xlim, ylim = ylim, cex = 0.75, xlab = NA, ylab = NA)
draw.shape(wmap, col = "grey", border = "NA")
draw.pie(x,y,z,radius = r, col=c("blue", "yellow", "red"))
legend.pie (x = -160, y = -70, labels = c("0", "1", "2"), radius = 5,
bty = "n", cex = 0.5, label.dist=1.5, col = c("blue", "yellow", "red"))

然后可以使用 legend.bubble 添加饼图大小的图例

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2 回答 2

2

我在包中发现了 subplot() Hmisc,这似乎正是我想要的。下面是我的解决方案(背景中没有地图,可以使用 绘制mapplots)。我愿意接受有关如何改进这一点的建议......

library(Hmisc)
library (circular)

dat <- data.frame(replicate(2,sample(0:360,10,rep=TRUE)))
lat <- c(50, -40)
lon <- c(-100, 20)

# convert to class circular
cir.dat <- as.circular (dat, type ='angles', units = 'degrees', template = 'geographic', modulo = 'asis', zero = 'pi/2', rotation = 'clock')

# function for subplot, plots relative frequencies, see rose.diag for how to adjust the plot
sub.rose <- function(x){
                nu <- sum(!is.na(x))
                de <- max(hist(x, breaks = (seq(0, 360, 30)), plot = FALSE)$counts)
                prop <- nu/de
                rose.diag(x, bins = 12, ticks = FALSE, axes = FALSE,
                radii.scale = 'linear',
                border = NA, 
                prop = prop,
                col = 'black'
                )
                }

plot(NA, xlim = xlim, ylim = ylim)
for(i in 1:length(lat)){
    subplot(sub.rose(cir.dat[,i]), x = lon[i], y = lat[i], size = c(1, 1))
    }
于 2014-02-12T16:02:27.720 回答
2

看看这个例子,你可以使用地图作为背景,用Plotrix或绘制你的玫瑰图ggplot2。在任何一种情况下,您都希望在地图上叠加多个这些图表,这在 ggplot 中很容易做到,只需查看示例即可。

于 2014-02-10T12:55:32.080 回答