This file will configure motion graphs in different ways to become a testbed for graph features.
How Numbers Appear (Using a Single Data-Set Graph)
Things to notice:
The number of decimal points on graph axes varies automatically. To understand how this works change both the absolute width of the graph (by resizing the java window,
and by dragging the numbers on the graph labels.
The number of decimal points displayed with the smart cursor and the label box is set in the Advanced Options; however, this feature is not WYSIWYG:
Whole numbers are displayed without decimal points. Time may only be read to the nearest 10th of a second, so that only decimal point settings of 0 and 1 have any effect
on Time.
The value of the real-time probe measurement displayed in the box is always displayed with 2 decimal points.
When Start is pressed, both Stop and Clear will stop the graph, but Clear will clear the data without user confirmation.
Bug: Clear should be grayed, until Stop is pressed. Actually, clearing the graph should have user confirmation through
popup dialog.
Stand 4 meters from the motion detector. Start collecting
data and remain still for the first two seconds. Then,
walk slowly toward the detector with a constant speed.
Stop when you are 1 meter in front of the detector.
This should show the
prediction from the previous page. It should allow probe data to
be displayed on top of it.
Matching the Motion
On the graph below, you will see a series of lines
(let's call it the target graph). Your task is to match
this target graph as best as possible by walking back
and forth. Before you begin, view the graph and write
down how you will walk to match this target graph.
After answering the question above, try to match this
graph by collecting data using the motion detector as
you walk back and forth.
View the target graph below. Describe how
you will walk to match this graph.0.0-0.03.9900252.9841275.9975063.06.97007471.50793658.004988-0.09.975062-0.0Describe any differences between your
prediction and the actual motion you performed to match
the target graph.
Another graph match
Let's try one more match.
For the target graph below, describe how you
will walk to match the target graph best.0.03.0158731.9902320.9841272.9914530.9841277.0085473.9841277.9975581.50793659.975581.5238096During which interval were you moving the
fastest?0 seconds - 2 seconds2 seconds - 3 seconds3 seconds - 7 seconds7 seconds - 8 seconds8 seconds - 10 secondsWhat evidence from the graph supports your
answer to the previous question?
New page
New page content
Using a Motion Detector
A prediction graph that shows its prediction on a
real-time graph later in the activity.
Try it out. Notice
that the smart cursor and Point Label display the number of decimal
points set in the Advance options, not like the on real-time data
that displays only 10ths of a second.
Real-Time Graph with Prediction
If a motion probe is attached to the compter and Start is pressed,
the data is overlayed over the prediction. This is as it should be.
However, if you look at the previous page the real-time data is
overlayed there too. I think this is a bug. It should not
appear...there is no way label it or to control its appearance.