如何解决'x'必须是r中的数字? [英] How to solve 'x' must be numeric in r?

问题描述

我正在尝试制作直方图，但是我一直遇到错误消息.这是我的代码

I'm trying to make a histogram but I keep running into the an error message. Here is my code

library(readxl)

data <- read_excel("data.xls")

View(data)
attach(data)
names(data)        

hist(data)

这是我的样品.我想创建一个直方图，y轴为0-100，x轴(安全，基本，有限等)在图中为数字(39、29、8、12、12).这有道理吗?

This is my sample. I want to create a histogram the y-axis be 0-100, x-axis (safely, basic, limited, etc) the numbers (39,29,8,12,12) be in the graph. Does this help make sense?

   Safely  Basic  Limited  Unimproved  Open

   39     29         8          12      12

hist.default(data)中的错误:"x"必须为数字

Error in hist.default(data) : 'x' must be numeric

我做错了什么?我不知道该错误消息.

What am I doing wrong? I don't know understand the error message.

推荐答案

问题是，当它需要一个向量作为参数 hist()函数> x (请参见?hist ).根据您编辑的帖子，您需要:

The issue is that you are passing a dataframe to the hist() function, when it requires a vector for its argument x (see ?hist). Based on your edited post, you would want:

hist(as.numeric(data[1,]))

data [1，] 在数据框的第一行中创建矢量.

Where data[1,] creates a vector from the first row of your dataframe.

尽管看起来您实际上可能正在寻找条形图.在这种情况下，请尝试:

Though it seems like you may actually be looking for a bar plot. In that case, try:

plot_data <- data.frame(t(data)) %>% 
  tibble::rownames_to_column()

ggplot(plot_data,aes(x = rowname,y=t.data.)) + 
  stat_identity(geom = "bar")

来自@ user2554330的一种简单的基本图形方法:

From @user2554330, a simpler base graphics method:

f <- as.numeric(data[1,])
names(f) <- names(data)
barplot(f)

这篇关于如何解决'x'必须是r中的数字?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！