Basic Analysis and Graphing - SAS

Chapter 17 Creating Parallel Plots 449
Example of a Parallel Plot
Example of a Parallel Plot
This example uses the Dogs.jmp sample data table, which contains histamine level measurements for 16
dogs that were given two different drugs. The histamine levels were taken at zero, one, three, and five
minutes. Examine the variation in the histamine levels for each drug.
1. Open the Dogs.jmp sample data table.
To see the differences by drug, color the parallel plot lines by drug:
2. Select Rows > Color or Mark by Column.
3. Select drug and click OK.
Morphine appears red and trimeth appears blue.
Create the parallel plot:
4. Select Graph > Parallel Plot.
5. Select hist0, hist1, hist3, and hist5 and click Y, Response.
6. Click OK.
The report window appears.
Figure 17.2 Parallel Plot of Histamine Variables
Each connected line segment represents a single observation. Click on a line segment to see which
observation (or row) it corresponds to in the data table.
For further exploration, isolate the trimeth values:
7. Select Rows > Data Filter.
8. Select drug and click Add.
9. Select trimeth.
Only the trimeth values are highlighted in the parallel plot.