Data capture question

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Diane Broberg

Jul 12, 2021, 10:07:13 PM7/12/21
Hi all!

I'm not sure any of you can answer this question. I created a document where I inserted an image on a graph, added a point (using geometry). Next page is a lits and spreadsheet that automatically captures data.  Point is dragged. The list and spreadsheet created does not have an equal number of x and y coordinates. It graphs fine on a data and statistics page but won't graph on a scatterplot and won't do regression.

Any ideas why it is collecting data this way?

Thanks for any thoughts.

John Hanna

Jul 13, 2021, 7:59:45 AM7/13/21

YES, Diane…


There’s an additional parameter for the capture command that forces a collect whenever xc or yc changes. Normally, the capture is activated when the capture variable changes so if the point is moves either vertically or horizontally only, then only one value is captured, not both.


The fix:



This keeps the lists ‘synced’. See attached.


Also, to ‘reset’ the data just edit the capture commands.

You could add a ‘reset’ slider with a Basic program in a math box that can clear the data (and reset itself).


Be Excellent,

     John Hanna

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Diane Broberg

Jul 13, 2021, 8:58:11 AM7/13/21
Thanks John. I have never heard that before. 


Kim Thomas

Jul 13, 2021, 4:04:24 PM7/13/21
to tinspire
How are you using this file for teaching? This looks like a great idea and I'm curious how you are applying this file in the classroom.
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