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我正在尝试创建一个带有可选 x、y 和颜色变量的绘图图,部分基于这个先前的问题。The x and y variable selection appears to work, however when new x and y variables are selected, the point color is lost.

此外,我尝试使用类似的策略来选择点颜色,但不幸的是这似乎不起作用。

另一种选择是在先前链接的问题中使用“设置可见”策略。

例子:

library(plotly)
library(pcaMethods)

pca <- pcaMethods::pca(mtcars, nPcs=3)

df <- as.data.frame(pca@scores)

colors1 <- sample(c("red", "green", "blue"), nrow(df), replace=TRUE)
colors2 <- sample(c("red", "green", "blue"), nrow(df), replace=TRUE)

p <- plotly::plot_ly(df, x = ~PC1, y = ~PC2, type = "scatter",
    color = sample(c("red", "green", "blue"), nrow(df), replace=TRUE),
    mode = "markers") 

p <-  plotly::layout(
    p,
    title = "Dropdown PCA plot",
    updatemenus = list(
        list(
            y = 0.7,
            buttons = list(
                list(method = "restyle",
                   args = list(
                    "x", list(df$PC1)
                    ),
                   label = "PC1"),
                list(method = "restyle",
                   args = list(
                    "x", list(df$PC2)
                    ),
                   label = "PC2"),
                list(method = "restyle",
                   args = list(
                    "x", list(df$PC3)
                    ),
                   label = "PC3")
                )
            ),
        list(
            y = 0.5,
            buttons = list(
                list(method = "restyle",
                   args = list(
                    "y", list(df$PC1)
                    ),
                   label = "PC1"),
                list(method = "restyle",
                   args = list(
                    "y", list(df$PC2)
                    ),
                   label = "PC2"),
                list(method = "restyle",
                   args = list(
                    "y", list(df$PC3)
                    ),
                   label = "PC3")
                )
            )
        )
    )

htmlwidgets::saveWidget(p, "test.html", selfcontained=FALSE)
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1 回答 1

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这目前在 R API 中是不可能的,因为从变量到绘图输出的映射是在 R 端完成的,而不是通过 plotly.js。

这在以下链接中进行了解释:https ://github.com/ropensci/plotly/issues/803

这个功能可以使用 plotly.js 和 HTML 来完成。必须将select元素添加到 HTML 页面,并添加事件侦听器以调用Plotly.newPlot()更新。

可以在这里看到一个示例实现:https ://github.com/Alanocallaghan/plotlyutils/blob/master/inst/htmlwidgets/lib/selectable_scatter_plot/selectable_scatter_plot.js

于 2017-02-21T10:18:43.387 回答