Example 4-74 Arranging Columns

This example arranges columns from the ore.frame object MTCARS that is created by using the ore.push function on the mtcars data.frame object. The second arrange() invocation calls the desc() function to arrange the values in descending order.

MTCARS <- ore.push(mtcars)
head(arrange(mtcars, cyl, disp))
head(arrange(MTCARS, desc(disp)))

Listing for This Example

R> MTCARS <- ore.push(mtcars)
R> head(arrange(MTCARS, cyl, disp))
   mpg cyl  disp  hp drat    wt  qsec vs am gear carb
1 33.9   4  71.1  65 4.22 1.835 19.90  1  1    4    1
2 30.4   4  75.7  52 4.93 1.615 18.52  1  1    4    2
3 32.4   4  78.7  66 4.08 2.200 19.47  1  1    4    1
4 27.3   4  79.0  66 4.08 1.935 18.90  1  1    4    1
5 30.4   4  95.1 113 3.77 1.513 16.90  1  1    5    2
6 22.8   4 108.0  93 3.85 2.320 18.61  1  1    4    1
R> head(arrange(MTCARS, desc(disp)))
   mpg cyl disp  hp drat    wt  qsec vs am gear carb
1 10.4   8  472 205 2.93 5.250 17.98  0  0    3    4
2 10.4   8  460 215 3.00 5.424 17.82  0  0    3    4
3 14.7   8  440 230 3.23 5.345 17.42  0  0    3    4
4 19.2   8  400 175 3.08 3.845 17.05  0  0    3    2
5 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
6 14.3   8  360 245 3.21 3.570 15.84  0  0    3    4