条形图中的颜色 [英] Color in plotly bar chart

问题描述

我正在尝试使用R中的plotly生成条形图.条形图应按值排序，并且有两类条形图，我想用不同的颜色进行着色.但是，当我添加颜色时，条形图被分为两组，并按组进行排序.关于如何将它们分组的任何提示?

I'm trying to generate a bar plot using plotly in R. The bars should be sorted by value and there are two classes of bars, which I want to color differently. However, when I add the color, the bars are split into two groups, sorted within groups. Any hint on how I can keep them in one group?

这是我的代码:

plotting.df = data.frame(names=c("a", "b", "c", "d", "e", "f", "g"),
                         value=c(1.9468656, 1.3867055, 1.0433950, 0.8949743, 0.3714826, 0.3605037, 0.3003954),
                         label=c("y", "n", "y", "n", "n", "n", "n"),
                         color=c("red", "black", "red", "black", "black", "black", "black"))
plotting.df$names = factor(as.character(plotting.df$names), levels=as.character(plotting.df$names)[order(plotting.df$value, decreasing=TRUE)])
plotting.df = plotting.df[order(plotting.df$value, decreasing=TRUE), ]
plot_ly(plotting.df, type="bar", x=names, y=value, 
        name="Comp a", 
        hoverinfo="text", text=c(paste("Name:", plotting.df$names, 
                                       "<br>Value:", signif(plotting.df$value, digits=3),
                                       "<br>Label:", plotting.df$label)),
        color=color)

还有一个例子:

推荐答案

有点麻烦，但这可以解决"所要求的特定问题.

It's a bit of a hack but this 'solves' the specific issue asked.

从数据框开始:

    library(tidyr)

    plotting.df2 <- plotting.df %>%
      spread(names, value, fill = NA) %>%
      gather("names", "value", a:g)

    plot_ly(plotting.df2, 
        type="bar", 
        x=names, 
        y=value, 
        name="Comp a", 
        hoverinfo="text", 
        color=color,
        text=c(paste("Name:", plotting.df$names, 
                     "<br>Value:", signif(plotting.df$value, digits=3),
                     "<br>Label:", plotting.df$label))) %>%
    layout(barmode = "stack")

基本上，此方法是为名称和颜色的每种组合创建一个数据点，并用NA填充.然后将它们堆叠在图中.

Basically this method is creating a data point for each combination of name and color, filled with NAs. Then these are stacked in the plot.

如果您以后想要实际堆叠数据值，则此解决方案"可能没有用，但希望这种破解至少可以暂时使某人摆脱类似的漏洞.

This 'solution' is probably useless if you want to actually stack data values later on, but hopefully this hack will get someone out of a similar hole at least temporarily.

本示例使用plotly3.x.x.如果您使用plotly 4.x.x或更高版本，则此代码可能无法按原样工作.详情请参阅此处: https://www. r-bloggers.com/upgradeing-to-plotly-4-0-and-above/

This example uses plotly 3.x.x. If you use plotly 4.x.x or above, this code may not work as is. See here for more details: https://www.r-bloggers.com/upgrading-to-plotly-4-0-and-above/

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