Databases Reference
In-Depth Information
Figure 2.16
Parallel Coordinate Plot
observations between the top and bottom filters are drawn. Initially all
observations are included given that the triangles are all the way to the top
and bottom of their respective axes.
To filter out all but a single observation, drag the triangle at the top of the
SepalWidth axis down to near the bottom. As you drag, observations
outside the range of the filter are removed from the plot. Keep dragging
until just one observation remains (Figure 2.17).
As with the scatter plot, scales for the axes are intentionally omitted. You
can read point values along the axes by hovering over locations up and down
an axis.
To read values for the depicted observation, first hover over the intersection
of the PetalLength axis and the line segment for the observation. As you
hover, the value 3.5 appears next to the mouse pointer, meaning that for this
observation, its PetalLength is 3.5 centimeters. Next hover over the
intersection of the line segment with the PetalWidth axis to see a value
of 1, then over SepalLength to see a value of 0.5, and on to SepalWidth for a
value of 2. Finally, you see the line segment end at Versicolor, telling you
the Variety of this observation.
Drag the filter triangle back to the top of the SepalWidth triangle to
redisplay all of the observations.
