相关疑难解决方法(0)

我想自定义plotly绘图中的颜色.这适用于连续变量和按照文档进行缩放:

library(plotly)

plot_ly(iris, x = Petal.Length, y = Petal.Width,
             color = Sepal.Length, colors = c("#132B43", "#56B1F7"),
             mode = "markers")

但是,如果我将参数设置为离散颜色(字符或因子),这仍然有效,但会发出警告:

> plot_ly(iris, x = Petal.Length, y = Petal.Width,
          color = Sepal.Length>6, colors = c("#132B43", "#56B1F7"),
          mode = "markers")


Warning message:
In RColorBrewer::brewer.pal(N, "Set2") :
  minimal value for n is 3, returning requested palette with 3 different levels

我该怎么做呢？