定义因子时发出警告:不推荐使用因子中的重复级别

Question

我在R中的雷达图表有点麻烦.即使情节很好,我也收到以下警告:

> source('~/.active-rstudio-document')
Warning message:
In `levels<-`(`*tmp*`, value = if (nl == nL) as.character(labels) else paste0(labels,  :
  duplicated levels in factors are deprecated
> radar
Warning messages:
1: In `levels<-`(`*tmp*`, value = if (nl == nL) as.character(labels) else paste0(labels,  :
  duplicated levels in factors are deprecated
2: In `levels<-`(`*tmp*`, value = if (nl == nL) as.character(labels) else paste0(labels,  :
  duplicated levels in factors are deprecated

我在其他帖子中看到了同样的错误,但我真的不明白如何将答案应用到我的数据集......

这是我的数据集

MSF,C1,2
OCA,C1,6
SIOA,C1,4
CCFF,C1,4
MSF,C2,4
OCA,C2,2
SIOA,C2,6
CCFF,C2,2
MSF,C3,6
OCA,C3,6
SIOA,C3,6
CCFF,C3,6

这是相应雷达图的代码(可能只是我定义我的数据集的第一部分是相关的,但是......这就是我丢失的地方):

colnames(dataset) = c("type", "variable", "value")
dataset$value = as.numeric(dataset$value)

dataset$variable <- factor(dataset$variable, levels = rev(dataset$variable), ordered=TRUE)

# Radar function ------------------------------------------------------------
coord_radar <- function (theta = "x", start = 0, direction = 1) {
  theta <- match.arg(theta, c("x", "y"))
  r <- if (theta == "x")
    "y"
  else "x"
  ggproto("CordRadar", CoordPolar, theta = theta, r = r, start = start,
          direction = sign(direction),
          is_linear = function(coord) TRUE)
}


# Radar plot ------------------------------------------------------------
radar <- ggplot(dataset, aes(x = variable, y = value, group=type)) +
  geom_polygon(aes(group = type, color=type,fill=type), size = 1, alpha=0.1) + 
  scale_fill_manual(values=cbPalette) +
  geom_line(aes(group = type, color=type)) + 
  scale_colour_manual(values = cbPalette) + 
  coord_radar() 

Answer 1

是的,几乎所有这些都与您的问题无关.

您正在尝试创建具有以下级别的因子:rev(dataset$variable).产量:

[1] C3 C3 C3 C3 C2 C2 C2 C2 C1 C1 C1

看看你如何复制水平？您希望按照您想要的顺序只为每个级别设置一次.默认值是sort(unique(dataset$variable)),C1 C2 C3或者你可以rev(unique(dataset$variable)用来给出C3 C2 C1.

该forcats软件包具有多种便利功能,可轻松制作或更改因素及其级别的顺序.