You can use the Parallel
Coordinates plot to make several inferences. Adjust the plot to explore the data based on cluster
membership, a specified range for one or more variables, or both.
To view just the polylines for a single cluster, select that cluster ID on the far
left. Notice that the polylines for all other
clusters are grayed out. This enables you to focus on a single cluster. To view multiple
clusters,
hold the Control key and select the clusters that
you want to view.
To view the
Parallel
Coordinates plot by a variable, click the button that corresponds to that variable. This action
changes
the
color gradient of the polylines so that larger values are darker than smaller values. To
undo the
variable selection, click anywhere to the left of
Cluster
ID.
To restrict the number of
bins displayed for a variable, click the top or bottom of a variable’s range and drag
the selection rectangle to the desired range. To move the selection rectangle, click
inside the rectangle, and drag the rectangle upward or downward. You can repeat this
process for other variables. To undo the selection for a variable, click the name
of that variable at the top of the
Parallel Coordinates plot.
Combining these two features, you can restrict the display to specific clusters and
variable ranges that interest you.