如何查看R中列的分布？

Question

我有一个如下所示的数据集：

!important

我可以运行什么来查看工资分配（第一栏）。具体来说，我想看看有多少人的工资低于300美元。

我可以运行什么ggplot功能？

Answer 1

试试这个：

library(dplyr)
library(ggplot2)
df <- df %>% filter(wage < 300)
qplot(wage, data = df)

Answer 2

您可以获得累积直方图：

library(ggplot2)
ggplot(df,aes(wage))+geom_histogram(aes(y=cumsum(..count..)))+
                     stat_bin(aes(y=cumsum(..count..)),geom="line",color="green")

如果您特别想知道具有特定条件的条目数，请在 base r 中使用以下内容：

count(df[df$wage > 1000,])

## # A tibble: 1 x 1
##       n
##   <int>
## 1     3

<强> 数据：的

 df <- structure(list(wage = c(769L, 808L, 825L, 650L, 562L, 1400L,            
     600L, 1081L, 1154L, 1000L), hours = c(40L, 50L, 40L, 40L, 40L,            
     40L, 40L, 40L, 45L, 40L), iq = c(93L, 119L, 108L, 96L, 74L, 116L,         
     91L, 114L, 111L, 95L), kww = c(35L, 41L, 46L, 32L, 27L, 43L,              
     24L, 50L, 37L, 44L), educ = c(12L, 18L, 14L, 12L, 11L, 16L, 10L,          
     18L, 15L, 12L), exper = c(11L, 11L, 11L, 13L, 14L, 14L, 13L,              
     8L, 13L, 16L), tenure = c(2L, 16L, 9L, 7L, 5L, 2L, 0L, 14L, 1L,           
     16L), age = c(31L, 37L, 33L, 32L, 34L, 35L, 30L, 38L, 36L, 36L            
     ), married = c(1L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L), black = c(0L,     
     0L, 0L, 0L, 0L, 1L, 0L, 0L, 0L, 0L), south = c(0L, 0L, 0L, 0L,            
     0L, 0L, 0L, 0L, 0L, 0L), urban = c(1L, 1L, 1L, 1L, 1L, 1L, 1L,            
     1L, 0L, 1L), sibs = c(1L, 1L, 1L, 4L, 10L, 1L, 1L, 2L, 2L, 1L             
     ), brthord = c(2L, NA, 2L, 3L, 6L, 2L, 2L, 3L, 3L, 1L), meduc = c(8L,     
     14L, 14L, 12L, 6L, 8L, 8L, 8L, 14L, 12L)), .Names = c("wage",             
     "hours", "iq", "kww", "educ", "exper", "tenure", "age", "married",        
     "black", "south", "urban", "sibs", "brthord", "meduc"), row.names = c(NA, 
     -10L), class = c("tbl_df", "tbl", "data.frame"))