轴上的标签过多 [英] Too many labels on axis

问题描述

我在R中的qplot时遇到了一些麻烦.我正在尝试从数据帧中绘制数据.当我执行下面的命令时，情节在左侧堆积(请参见下图).数据帧只有963行，所以我认为大小不是问题，但是我可以在较小的数据帧上使用相同的命令，看起来不错.有什么想法吗?

I'm having some trouble with qplot in R. I am trying to plot data from a data frame. When I execute the command below the plot gets bunched up on the left side (see the image below). The data frame only has 963 rows so I don't think size is the issue, but I can use the same command on a smaller data frame and it looks fine. Any ideas?

library(ggplot2)
qplot(x=variable,
   y=value,
   data=data,
   color=Classification,
   main="Average MapQ Scores")

或类似地:

ggplot(data = data, aes(x = variable, y = value, color = Classification) +
  geom_point()

推荐答案

您的列value应该是数字时可能是一个因素.这会导致value的每个分类值在y轴上都有自己的输入项，从而产生您所注意到的效果.

Your column value is likely a factor, when it should be a numeric. This causes each categorical value of value to be given its own entry on the y-axis, thus producing the effect you've noticed.

您应该将其强制为数字

data$value <- as.numeric(as.character(data$value))

请注意，可能有充分的理由将其解释为一个因素而不是一个数字，可能是因为它具有一些不是纯数值的条目(可能是1,000或1000 m或其中的某些其他字符条目)号码).强制执行的结果可能是信息丢失，因此请予以警告或彻底清除数据.

Note that there is probably a good reason it has been interpreted as a factor and not a numeric, possibly because it has some entries that are not pure numeric values (maybe 1,000 or 1000 m or some other character entry among the numbers). The consequence of the coercion may be a loss of information, so be warned or cleanse the data thoroughly.

此外，您在x轴上似乎也遇到了同样的问题.

Also, you appear to have the same problem on the x-axis.

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