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#data ##data list

library(gtsummary)
airquality

NA

#analysis ##univariate

```{r)

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```r
library(dplyr)
airquality %>% 
  tbl_summary()

Characteristic	N = 1531
Ozone	32 (18, 64)
Unknown	37
Solar.R	205 (115, 259)
Unknown	7
Wind	9.7 (7.4, 11.5)
Temp	79 (72, 85)
Month
5	31 (20%)
6	30 (20%)
7	31 (20%)
8	31 (20%)
9	30 (20%)
Day	16 (8, 23)
1 Median (Q1, Q3); n (%)

NA

#selected variable

head(airquality)

NA
NA
NA
NA

airquality %>% 
tbl_summary( 
by = "Month") 

Characteristic	5 N = 311	6 N = 301	7 N = 311	8 N = 311	9 N = 301
Ozone	18 (11, 32)	23 (20, 37)	60 (35, 80)	52 (28, 84)	23 (16, 36)
Unknown	5	21	5	5	1
Solar.R	194 (66, 290)	189 (127, 273)	253 (175, 274)	198 (99, 233)	192 (112, 236)
Unknown	4	0	0	3	0
Wind	11.5 (8.6, 14.3)	9.7 (8.0, 11.5)	8.6 (6.9, 10.9)	8.6 (6.3, 11.5)	10.3 (7.4, 12.6)
Temp	66 (59, 69)	78 (76, 83)	84 (81, 86)	82 (79, 89)	76 (71, 81)
Day	16 (8, 24)	16 (8, 23)	16 (8, 24)	16 (8, 24)	16 (8, 23)
1 Median (Q1, Q3)

#p value

airquality %>% 
tbl_summary( by = "Month")%>%
  add_p()

Error in airquality %>% tbl_summary(by = "Month") %>% add_p() : 
  could not find function "%>%"

airquality %>%
  tbl_summary(
    by = "Month")

Error in airquality %>% tbl_summary(by = "Month") : 
  could not find function "%>%"