计数观察和考虑条件

Question

我有这样一个数据库：

id <- c(rep(1,3), rep(2, 3), rep(3, 3))
condition <- c(0, 0, 1, 0, 0, 1, 1, 1, 0)
time_point1 <- c(1, 1, NA)
time_point2 <- c(NA, 1, NA)
time_point3 <- c(NA, NA, NA)
time_point4 <- c(1, NA, NA, 1, NA, NA, NA, NA, 1)

data <- data.frame(id, condition, time_point1, time_point2, time_point3, time_point4)
data

  id condition time_point1 time_point2 time_point3 time_point4
1  1         0           1          NA          NA           1
2  1         0           1           1          NA          NA
3  1         1          NA          NA          NA          NA
4  2         0           1          NA          NA           1
5  2         0           1           1          NA          NA
6  2         1          NA          NA          NA          NA
7  3         1           1          NA          NA          NA
8  3         1           1           1          NA          NA
9  3         0          NA          NA          NA           1

我想做一个 table 有多少人有条件 == 1 (n_x) 以及每个时间点有多少人 (n_t)。如果还有 none，我也想要一个 0。我试过这个：

data %>% 
  pivot_longer(cols = contains("time_point")) %>% 
  filter (!is.na(value)) %>% 
  group_by(name) %>% 
  mutate(n_t = n_distinct(id)) %>% 
  ungroup() %>% 
  filter(condition == 1) %>%
  group_by(name) %>%
  summarise(n_x = n_distinct(id), n_t = first(n_t))

获得这个：

  name          n_x   n_t
  <chr>       <int> <int>
1 time_point1     1     3
2 time_point2     1     3

期望的结果：我想要这种考虑有条件和没有条件的情况的table：

         name n_x n_t
1 time_point1   2   6
2 time_point2   1   3
3 time_point3   0   0
4 time_point4   0   3

谢谢！

Answer 1

您可以 pivot_longer() 能够 group_by() time_points 然后总结只是将值相加。对于条件，仅对 values != NA.

列的值求和

data %>% 
  pivot_longer(cols=c(3:6),names_to = 'point', values_to='values') %>%
  group_by(point) %>% 
  summarise(n_x = sum(condition[!is.na(values)]), n_t = sum(values, na.rm = TRUE))

输出：

# A tibble: 4 x 3
  point         n_x   n_t
  <chr>       <dbl> <dbl>
1 time_point1     2     6
2 time_point2     1     3
3 time_point3     0     0
4 time_point4     0     3

计数观察和考虑条件

Counting observations and considering condition

r

dplyr

count

tidyr