在R堆积的条形图中,颜色根据变量映射

时间:2015-02-24 12:29:29

标签: r colors ggplot2 bar-chart stacked-chart

我刚从R开始,我被困在了条形码上。 我想制作一个堆积的条形图,其中颜色是根据变量选择的。

我的数据看起来像这样:

厚度
点3点5点6点7点8点9点11
layer1 25 20 90 80 100 45 75
layer2 5 20 0 0 0 70 0
layer3 80 5 0 0 0 0 0

类型
点数3点5点6点7点8点9点11
layer1 4 3 3 3 3 3 3
layer2 5 5 6 6 6 5 6
layer3 4 3 6 6 6 6 6

对于每个点,需要将多个厚度AL堆叠在一起,而AL_col类型表示堆叠的条纹需要具有的颜色。

我的剧本:

col1<-c("green","brown","purple","black","yellow", "white")
barplot(Thickness, col=col1[Type])

谢谢!

修改

我会尝试更好地解释一下: 我有10.000个位置,这些是点(例如,在点3,5,6,7,8,9,11上面的例子) 这些位置可以由3层组成。 这些层的厚度和材料类型不同。 我想要做的是: 对于每个点都有一个堆叠的条形图,其中可以看到每层的厚度。 并且要查看我想要使用颜色方案的材料类型。每个点都有所不同。

2 个答案:

答案 0 :(得分:1)

可能使用ggplot

而不是基于R图形
library(ggplot)

AL <- data.frame(point = c(3, 5, 6, 7, 8, 9, 11), layer1 = c(1, 25, 20, 90, 80, 100, 45),
                 layer2 = c(5, 20, 0, 0, 0, 70, 0), layer3 = c(80, 5, 0, 0, 0, 0, 0))
AL.m <- melt(AL, id.vars = "point")

col1<-c("green","brown","purple","black","yellow", "white")
barplot(AL, col=col1[AL_col])

ggplot(AL.m, aes(x = point, y = value, fill = variable)) + geom_bar(stat = "identity", position = "stack") +
  scale_fill_manual(values = col1)

enter image description here

在评论后编辑 由于只有三层,因此只使用col1的前三种颜色。 我不清楚你正在寻找什么替代着色方案。

答案 1 :(得分:0)

标准条形图也很好,你只需要将数据放在矩阵中。示例:

    L <- data.frame(point = c(3, 5, 6, 7, 8, 9, 11), 
    layer1 = c(1, 25, 20, 90, 80, 100, 45),                  
    layer2 = c(5, 20, 0, 0, 0, 70, 0), 
    layer3 = c(80, 5, 0, 0, 0, 0, 0))

    barplot(t(as.matrix(L)),col=c("blue","black","yellow","orange"))

enter image description here

完全按照你想要的方式进行循环:

    L <- data.frame(
            layer1 = c(25, 20, 90, 80, 100, 45),     
            layer2 = c(5, 20, 0, 0, 70, 0), 
            layer3 = c(80, 5, 0, 0, 0, 0))
    rownames(L)<-c(3, 5, 6, 7, 8, 9)

    AL_col <- matrix(c(
                4,3,3,3,3,3,
                5,5,6,6,6,5,
                4,3,6,6,6,6),ncol=6,byrow=TRUE)
    colnames(AL_col) <- c("point3","point5","point6","point7","point8","point9")
    rownames(AL_col) <- c("layer1","layer2","layer3")

    col1<-c("green","brown","purple","black","yellow", "white","blue")

    # the problem is then to make polygons corresponding to your colors

    maxHeight <- max(as.matrix(L) %*% rep(1,dim(L)[2]))
    widthPol <- 0.5
    plot(c(1-widthPol,dim(L)[1]+widthPol),c(0,maxHeight),type="n",xlab="Points",ylab="Height")

    for(iPoint in 1:6){
        currentY <- 0
        for(iLayer in 1:3){
            addedY <- L[iPoint,iLayer]
                if(addedY>0){
                    xs <- c(rep(iPoint-widthPol/2,2),rep(iPoint+widthPol/2,2))
                        ys <- c(0,addedY,addedY,0)
                        colPoly <- col1[AL_col[iLayer,iPoint]]
                        polygon(x=xs,y=ys+currentY,col=colPoly)
                        currentY <- currentY + addedY
                }
        }
    }

enter image description here