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library(readr)
library(ggplot2)
d01 <- read_csv("lesson3/A03L01.csv")

## Rows: 200 Columns: 2
## ── Column specification ────────────────────────────────────────────────────────
## Delimiter: ","
## chr (1): subject
## dbl (1): score
## 
## ℹ Use `spec()` to retrieve the full column specification for this data.
## ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.

ggplot(d01)+geom_boxplot(aes(x=subject,y=score))