Measure. Analyze. Learn.
Hi, today I'm going to show you some of the features
and the classroom use of Graphical Analysis
an iPad app from Vernier.
Graphical Analysis allows lab groups to harness the power
of Vernier data collection solutions such as LabQuest 2.
Graphical Analysis provides new opportunities to lab groups.
For example, every student in the lab group
will get their own copy of the data.
Individuals will be able to pinch and zoom
and annotate their data analysis,
and all of that will be auto saved for each student.
Let's begin an experiment.
In this experiment, student 1 and student 2
will both get their own copy of the data.
The data will be the same, but each of them
will do their own data analysis,
and that is what will be saved in the app.
Let me show you how it works.
First, I am going to tap this '+' button to add a session.
You can see that it automatically identifies
devices that are on the network.
I'll go ahead and start a session here with the LabQuest.
You can see that the app has automatically identified
that I have a motion detector connected to my LabQuest.
I can use the button here, inside the app
to start and stop data collection.
I'm going to go ahead and start this.
And you can see that the data are collected in real-time,
both for student 1, and for student 2.
Now, each individual student can go ahead
and do their own analysis.
So, let's take a closer look at the app.
Here are some of the tools.
You can see this gear icon.
In that menu, you'll find:
settings, network information, and a user guide.
The view options include:
a meter view,
a table view, where you can see all the data,
and options for showing different numbers of graphs.
In the add session menu:
In addition to being able to choose devices,
you can actually do a lot
without a device connected to the network.
For example, you can use the internal accelerometer
built into the iPad.
Or, you can choose manual data entry,
and enter in your own numbers and perform the same
data analysis with those numbers that you have specified.
Finally, there is an export option,
which enables students to export graphs
or data, either to another app or to their teacher
so that their teacher can have a look at it.
Now, let's take a closer look at
some of the options for data analysis.
Now that I have my experiment finished, I can
tap anywhere on the screen and see what those values are.
It will show both the x and the y values
for that position in the graph.
I can zoom in on the graph with a pinch.
I can zoom back out.
If I drag it will make a selection.
I can zoom in on that selection, just by double tapping.
To zoom back out, you can double tap again,
or you can tap once on this zoom thumbnail,
and that will auto scale your data.
Tapping on a selection brings up some selection options.
For example, I can add an annotation so I know
what this part of the experiment is supposed to tell me.
I'll write 'free fall' here.
And then, I'll choose from one of these fits.
There are various curve fits here,
and I think a quadratic will look very nice here.
That looks pretty good.
I can even drag the edges of my selection to adjust them.
I can tap and hold, and adjust the whole selection,
and you can see that the fits update in real time.
Once that looks the way you want it,
you can tap on this button with the 'i'.
and it will show you the graph options:
You can name your graph.
You can add a caption that explains
what is happening in the experiment.
You can also adjust the appearance.
If you don't like the look of the lines,
if it's important you see the points, you can show the points,
or you can show both.
You can see that the title is available here in the options.
Tap on the y-axis to see any of the runs that you
have taken over all this time. You can show them together.
And, tapping any of these will select, or deselect them.
Tap on the x-axis, to choose between x axis variables.
And then, finally, if you tap on this icon in the corner
you will bring up the history.
This will show you all the experiments that you've taken,
and you can pull up any of them and finish your data analysis.
And, you still have the same tools,
and the same ability to export, or to open it in another app.
These are some of the features available
in Graphical Analysis for iPad.
It's available now in the App Store.
And, we're looking forward to seeing what you can do with it.