```r
d<-read_csv("sleep.csv")
```

```
## 
## ── Column specification ────────────────────────────────────────────────────────
## cols(
##   Species = col_character(),
##   BodyWt = col_double(),
##   BrainWt = col_double(),
##   Sleep = col_double(),
##   MaxAge = col_double(),
##   Gestation = col_double(),
##   Diet = col_character()
## )
```