Segmented bar chart

[Sean Bird]

I was working with some AP Stats teachers who were looking to better show conditional probability. The wanted to easily make the TI-Nspire display a segmented bar chart (Excel demo), and with Fathom it is referred to as ribbon chart. I made up a kind of work around that really doesn't work. So I thought that perhaps this is a job for a talented stat-minded Lua programmer. Anyone interested? Or are there other ideas from our stat teachers? Would this be a much appreciated feature?

Over the years there have been some great improvements with Data & Statistics, from the recently added ability to turn "Diagnostics on" under D&S settings (press Menu), to the 5 years ago added capability of forcing categorical and Navigator improvements that made aggregating data easier. If you want to see an example of Data & Statistics from its early years, check out a Thanksgiving post I blogged 7 years ago.

Thanks,

Sean Bird

[Dennis Donovan]

Here is a non Lua version that is limited to 5 groups (bars) and 5 categories (segments), I think that should be enough for most purposes.  It is 2.0 because I found a neat way to condense the code (from my first version) with indirection (I left page 1.6 visible with the program).

You enter your categorical counts in the group lists on page 1.2.  If you show the page sorter while entering the counts, page 1.3 will looked messed up until all the groups have an equal number of categories.

Here is what's on the pages:

1.3: Segmented Bar Graph

1.4: Categorical Percentages

1.5: Cumulative Percentages

1.6: The program - You may want to delete this page before distributing.

Dennis Donovan

---

From: Sean Bird <covena...@gmail.com>
To: tinspire <tins...@googlegroups.com>
Sent: Thursday, February 4, 2016 11:11 PM
Subject: [tinspire] Segmented bar chart

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[Al Coons]

Great work Dennis,

May I share your work with the AP Statistics AP Discussion Group if you or someone else are not going to?

Al

-------------------------

Albert Coons

aco...@bbns.org

Buckingham Browne & Nichols School

Gerry's Landing Road

Cambridge, MA 02138

(617) 800-2264

AP Statistics Web Site:  www.bbn-school.org/us/math/ap_stats

<Segmented Bar Graphs 2.0.tns>

[Dennis Donovan]

Al,

Yes, you can share it. 

Dennis

Sent from my iPhone

[Al Coons]

Thanks Dennis,

Could you contact me at my school email below so I can include just a bit more info than just your name?

Thanks,

Al

-------------------------

Albert Coons

aco...@bbns.org

Buckingham Browne & Nichols School

Gerry's Landing Road

Cambridge, MA 02138

(617) 800-2264

AP Statistics Web Site:  www.bbn-school.org/us/math/ap_stats

[Sean Bird]

Dennis,
Well done! I think I'll know some excited Stats teachers.
That is some outstanding programming. Take a look at the attached to see if you like the layout of the graph on 1.3 a bit better. I pinned some text and tidied some things up. I'm not sure if I like the 0.2 scale or if it should stay 0.1.
Version 2.02 attached has the horizontal lines to aid in seeing the percentage. Is this helpful or distracting?

Thanks for sharing your work.

[landy godbold]

Dennis and Sean (and Al):

First, thanks for a much-needed feature. But I can't believe that you
limited the number of categories to five when there are SIX colors for
M&Ms :-)

What's a stats teacher to DO?

cheers,
landy

> ------------------------------------------------------------------------
> *From:* Sean Bird <covena...@gmail.com
> <mailto:covena...@gmail.com>>
> *To:* tinspire <tins...@googlegroups.com
> <mailto:tins...@googlegroups.com>>
> *Sent:* Thursday, February 4, 2016 11:11 PM
> *Subject:* [tinspire] Segmented bar chart

>
> I was working with some AP Stats teachers who were looking to better
> show conditional probability. The wanted to easily make the
> TI-Nspire display a segmented bar chart (Excel demo

> <https://www.youtube.com/watch?v=g9JzmLR8UOQ>), and with Fathom it

> is referred to as ribbon chart

> <http://fathom.concord.org/help/HelpFiles/index.html?ribbon_chart.html>.

> I made up a kind of work around that really doesn't work. So I
> thought that perhaps this is a job for a talented stat-minded Lua
> programmer. Anyone interested? Or are there other ideas from our
> stat teachers? Would this be a much appreciated feature?
>
>
> Over the years there have been some great improvements with Data &
> Statistics, from the recently added ability to turn "Diagnostics on"
> under D&S settings (press Menu), to the 5 years ago added capability
> of forcing categorical and Navigator improvements that made
> aggregating

> <https://sites.google.com/site/tinspiregroup/classroom-news/aggregatingdata>data

> easier. If you want to see an example of Data & Statistics from its
> early years, check out a Thanksgiving post

> <http://bird-godlydominion.blogspot.com/search?q=thanksgiving> I

> blogged 7 years ago.
>
> Thanks,
> Sean Bird
>

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[Dennis Donovan]

Wow, I never even thought of that.  Clearly an oversight!

Here is an updated version with 6 categories allowed.  It also has a cleaned up graph page as well, thanks to Sean Bird.

I even changed the segment colors to match the M&M Colors, from bottom to top - Red, Orange, Yellow, Blue, Green, Brown

Dennis

---

From: landy godbold <l.go...@comap.com>
To: tins...@googlegroups.com
Sent: Monday, February 8, 2016 1:17 PM
Subject: Re: [tinspire] Segmented bar chart

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[John Hanna]

What causes the program to run? I don’t see it on a Notes page.

 

Best Regards,

         John Hanna

         jeh...@optonline.net

         www.johnhanna.us

         T³ - Teachers Teaching with Technology

         http://education.ti.com

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[Dennis Donovan]

There's a "hidden" notes page on the first page at the bottom.

---

From: John Hanna <jeh...@optonline.net>
To: tins...@googlegroups.com
Sent: Monday, February 8, 2016 2:55 PM
Subject: RE: [tinspire] Segmented bar chart

[John Hanna]

Thanks… I knew it had to be there somewhere! Verrrry subtle!

[Sean Bird]

The most updated version of Segmented Bar Graph TI-Nspire file is posted on our TI-Nspire Group Website.
It is in the Statistics section toward the bottom of the page

You can get it directly from Segmented Bar Graphs.tns Download
Note: With this version the program page 1.6 is hidden/removed.

Pass this on to all your Statistics friends.

I think it is ready for prime time. Collaboration certainly can make life better. I'm grateful for Jenny from Chicago who first asked me about segmented bar graphs. And thanks for making the request for categorical M&M data, Landy, and for other suggestions from Al that prompted Dennis to make this the best version yet. Perhaps we should give Dennis some M&Ms when we see him at the Teachers Teaching with Technology International Conference. We are especially thankful for his keen programming skills.

What does anyone think of the color of the text or fill on the List & Spreadsheet page 1.2? Helpful?

On Mon, Feb 8, 2016 at 1:17 PM, landy godbold <l.go...@comap.com> wrote:

Dennis and Sean (and Al):

First, thanks for a much-needed feature.  But I can't believe that you limited the number of categories to five when there are SIX colors for M&Ms   :-)

What's a stats teacher to DO?

cheers,
landy


On 2/8/2016 2:56 AM, Sean Bird wrote:

Dennis,
Well done! I think I'll know some excited Stats teachers.
That is some outstanding programming. Take a look at the attached to see if you like the layout of the graph on 1.3 a bit better. I pinned some
text and tidied some things up. I'm not sure if I like the 0.2 scale or
if it should stay 0.1.

To give 1.3 its current style, first I changed the menu>View to Geometry. Then removed the scale. Next I  menu > View > Show Analytic Window and grabbed the endpoints to make it fit the screen like I wanted or thought would look okay.
Then I fixed the window to be from 0 to 1 for y and 0 to 20 for x.

The small number font can be found in the symbols (ctrl catalog, or it is in the catalog) toward the very bottom.

I now also made the Notes page with the program on it be on a split screen on the first page.

    TI-Nspire display a segmented bar chart, and with Fathom it

    is referred to as ribbon chart
    <http://fathom.concord.org/help/HelpFiles/index.html?ribbon_chart.html>.
    I made up a kind of work around that really doesn't work. So I
    thought that perhaps this is a job for a talented stat-minded Lua
    programmer. Anyone interested? Or are there other ideas from our
    stat teachers? Would this be a much appreciated feature?


    Over the years there have been some great improvements with Data & Statistics, from the recently added ability to turn "Diagnostics on"  under D&S settings (press Menu), to the 5 years ago added capability of forcing categorical and Navigator improvements that made aggregating

    <https://sites.google.com/site/tinspiregroup/classroom-news/aggregatingdata> data easier. Check out the link for M&M national data. If you want to see an example of Data & Statistics from its early years, check out a Thanksgiving post