Chapter 4 - Workflow: basics
library(tidyverse)4.4 Practice
1. Why does this code not work?
my_variable <- 10
my_varıableThe code does not work because there is a typo in the variable name that you are calling. The letter “i” is not the same in my_var(i)able.
2. Tweak each of the following R commands so that they run correctly:
ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy))
fliter(mpg, cyl = 8)
filter(diamond, carat > 3)To fix the commands, change “dota” to “data”, “fliter” to “filter”, “=” to “==”, and “diamond” to “diamonds”.
library(tidyverse)
ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy))
filter(mpg, cyl == 8)## # A tibble: 70 x 11
## manufacturer model displ year cyl trans drv cty hwy fl class
## <chr> <chr> <dbl> <int> <int> <chr> <chr> <int> <int> <chr> <chr>
## 1 audi a6 q… 4.2 2008 8 auto… 4 16 23 p mids…
## 2 chevrolet c150… 5.3 2008 8 auto… r 14 20 r suv
## 3 chevrolet c150… 5.3 2008 8 auto… r 11 15 e suv
## 4 chevrolet c150… 5.3 2008 8 auto… r 14 20 r suv
## 5 chevrolet c150… 5.7 1999 8 auto… r 13 17 r suv
## 6 chevrolet c150… 6 2008 8 auto… r 12 17 r suv
## 7 chevrolet corv… 5.7 1999 8 manu… r 16 26 p 2sea…
## 8 chevrolet corv… 5.7 1999 8 auto… r 15 23 p 2sea…
## 9 chevrolet corv… 6.2 2008 8 manu… r 16 26 p 2sea…
## 10 chevrolet corv… 6.2 2008 8 auto… r 15 25 p 2sea…
## # … with 60 more rowsfilter(diamonds, carat > 3)## # A tibble: 32 x 10
## carat cut color clarity depth table price x y z
## <dbl> <ord> <ord> <ord> <dbl> <dbl> <int> <dbl> <dbl> <dbl>
## 1 3.01 Premium I I1 62.7 58 8040 9.1 8.97 5.67
## 2 3.11 Fair J I1 65.9 57 9823 9.15 9.02 5.98
## 3 3.01 Premium F I1 62.2 56 9925 9.24 9.13 5.73
## 4 3.05 Premium E I1 60.9 58 10453 9.26 9.25 5.66
## 5 3.02 Fair I I1 65.2 56 10577 9.11 9.02 5.91
## 6 3.01 Fair H I1 56.1 62 10761 9.54 9.38 5.31
## 7 3.65 Fair H I1 67.1 53 11668 9.53 9.48 6.38
## 8 3.24 Premium H I1 62.1 58 12300 9.44 9.4 5.85
## 9 3.22 Ideal I I1 62.6 55 12545 9.49 9.42 5.92
## 10 3.5 Ideal H I1 62.8 57 12587 9.65 9.59 6.03
## # … with 22 more rows