Plot of raw distance readings

[Sai To Yeung]

Hey guys,

You might have done this already, but I took a couple trials of raw readings and calculated the distances of each point to one another. The two trials consist of sixteen consecutive readings.  The y axis are the distances from point 0 to point 1, point 0 to point 2, point 0 to point 3, etc. and the x axis is the number of the reading.

The attached spreadsheet shows a couple sets of plots (one on each worksheet). The interesting thing to note is that the readings were consecutive/on a curve, which means that each reading is related to the previous reading and implies that the motion of how you slide your card is probably the culprit.  The biggest range I saw was 20 pixels.

I don't think there's any way around this reading error, so we may need to get creative on how we handle the data afterwards.  

Let me know what your thoughts are or if you guys discovered anything else today.

Thanks,

Sai To