Re: [Phys-L] Simply more data for you-all plots of details

[brian whatcott <betwys1@sbcglobal.net>]

On 9/21/2017 8:39 PM, bernard cleyet wrote:
> > On 2017/Sep/21, at 17:42, brian whatcott <betwys1@sbcglobal.net> wrote:
> >
> > Here is what Bernard's data looks like, for his second data file today:
> >
> > https://i.imgur.com/3bfH2EH.jpg
> >
> > ..and in close up, the first twelve samples of that file:
> >
> > https://i.imgur.com/wfW3OTK.jpg
/snip/
> Yes.  Are these for two lobe or three?  But I also collected skip one, in which case only every other is collectd so for a pendulum, it’s the period instead of the beat.  I collected using both for the three lobe.  curiously, the one method (beat or period) and the other  (PG interrupted time) are very different in that one has a “huge” glitch and tother doesn’t.
/snip/
>   
> New data;  of the massiest three legged spinner; I spun so fast MicroSet doesn’t respond until slower.
>
> Two modes:  time one where leading edge to leading times recorded (so will be three times the “actual” rate, I think.), and time 1 skip.  This one is designed to measure the period instead of the beat of a pendulum, I pray, the result is 3/2 times the “actual”.
>
> Note the last column is the PG interrupted time.  This Bryan included so one may find the amplitude of a free pendulum using the work energy theorem.
>
>
> http://cleyet.org/spinner/bc's/spinner%20third%20from%20left/
Bernard, you asked about features of your data sets.
I plotted  all the data sets you provided, with plot extracts that 
looked interesting.

You began with a frequency versus time data set on September 18th.

Here's the plot of freq versus time as [bc 9/18 audio all]
(https://i.imgur.com/s64b7qT.jpg)

Here's a plot of just the frequency elements as [bc 9/18 audio_freq all 
cols]
(https://i.imgur.com/oiImxKF.jpg)

Here is a close up of the frequency data 25:35   as [bc 9/18 audio_freq 
col 25:35](https://i.imgur.com/YnKV9vR.jpg)

Here is a plot of the time elements as [bc 9/18 audio_time]
(https://i.imgur.com/T9MVhpJ.jpg)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
You added a 'first try' on Sep 19
Here is a plot of ALMOST all elements except the last few as [bc 9/19 
"first try" col 1:620](https://i.imgur.com/IOrBRT0.jpg)

Here's a close-up on the first ten  elements, showing the saw tooth as 
[bc 9/19 "first try" col 1:10]
(https://i.imgur.com/V9dlcaJ.jpg)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Moving on to your data of 9/21: first, the data times in the 'skip" series.

A plot of the 'skip' data times as [bc data 9/21 "skip" 3-leg  col 2 
all  - time]
 (https://i.imgur.com/GD8IVmj.jpg)

A close-up of the first ten times from "skip" as [bc data 9/21 "skip" 
3-leg  col 2 1:10  time]
(https://i.imgur.com/2jINvaO.jpg)

Discontinuities at 180:200  of "skip" times as [bc data 9/21 "skip" 
3-leg  col 2 180:200  time]
(https://i.imgur.com/iRlTXp2.jpg)

More discontinuities at 45:65 as [bc data 9/21 "skip" 3-leg  col 2 
45:65  time]
(https://i.imgur.com/ZJ6mcww.jpg)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Photogate Times in "skip" series

All the photogate times from  "skip" as [bc data 9/21 "skip" 3-leg col 
10  all = pgtime](https://i.imgur.com/7Cmghj1.jpg)

Next, I show the PG sawtooth waveform from "skip" at the first 10 
photogate times as
[bc data 9/21 "skip" 3-leg  col 10 1:10  time]
(https://i.imgur.com/dyo34Hr.jpg)

More "skip" photogate discontinuities as [bc data 9/21 "skip" 3-leg col 
10 40:60   pg time]
(https://i.imgur.com/8mJB1lt.jpg)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
You also provided  beat times as "time"

Plot of all beat data in the "time" series as [bc data 9/21 "time" 
3-leg  column 1 all] (https://i.imgur.com/ZqTuWbm.jpg)

Discontinuities 1:10  in close-up as [bc data 9/21 "time" 3-leg column 1 
1:10]
(https://i.imgur.com/NRUDZaK.jpg)

More discontinuities at [bc data 9/21 "time" 3-leg  column 1 
225:260](https://i.imgur.com/kSOtw7W.jpg)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Finally, you provided photogate times in the "time" series.

All photogate times in the 'Time' series as

[bc data 9/21 "time" 3-leg  column 7 = photogate time] 
(https://i.imgur.com/nEDJH5X.jpg)

Close-up on the beginning ten photogate times as

[bc 9/21 "time" 3 leg column 7 photogate 1:10]

shown here (https://i.imgur.com/pZN0C9b.jpg)

Last, a close-up of a photogate discontinuity in the 'time' series as 
[bc 9/21 "time" 3 leg column 7 photogate 40:60]

shown here (https://i.imgur.com/cX2vdWl.jpg)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


Hope this shows up the saw-teeth in each pair or trio of data values,

and discontinuities in the various series.


Brian W