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Fourier series graphing tests

Posted: Tue Jul 27, 2021 4:55 pm
by Steve-Matrix
During the development of the v9.2 update I created various projects to test the updated features. I thought I'd share these two which I developed to test the graphing improvements.

They both show how a square wave can be approximated by adding together a series of sine waves. The "X increment" slider effectively sets the resolution of the graph - lower values give better resolution but are slower to plot (when X increment = 1, values for all 10,000 coordinates are calculated and plotted).

I hope you find these interesting or useful.

square fourier 1.png
square fourier 1.png (200.43 KiB) Viewed 4961 times
square fourier 2.png
square fourier 2.png (149.14 KiB) Viewed 4961 times

Re: Fourier series graphing tests

Posted: Tue Jul 27, 2021 5:08 pm
by p.erasmus
Beautiful stuff Steve :D

Re: Fourier series graphing tests

Posted: Thu Jul 29, 2021 1:21 pm
by stefan.erni
Hi Steve

Thanks a lot.

Yes it's a big help, how to use the graf. I will try to display my EKG (heartbeat).

regards

Stefan

Re: Fourier series graphing tests

Posted: Thu Jul 29, 2021 1:52 pm
by Steve-Matrix
stefan.erni wrote:
Thu Jul 29, 2021 1:21 pm
I will try to display my EKG (heartbeat).
Please post an image if you get this working - it would be great to see!

Re: Fourier series graphing tests

Posted: Thu Aug 05, 2021 10:39 am
by stefan.erni
Hi Steve

The chart is working nice together with Bluetooth to show ECG.
As a sample: Chart with 2 seconds or 20 seconds.

regards

Stefan
ecg_2_2021-08-04_19-11-24.png
ecg_2_2021-08-04_19-11-24.png (47.43 KiB) Viewed 4873 times
ecg_4_2021-08-04_20-03-15.png
ecg_4_2021-08-04_20-03-15.png (178.71 KiB) Viewed 4873 times

Re: Fourier series graphing tests

Posted: Thu Aug 05, 2021 11:15 am
by medelec35
Hi, Stefan.
That looks really good!
I Thought I would mention Steve is on holiday, so I'm not sure when he will be able to read your post.

Re: Fourier series graphing tests

Posted: Fri Aug 06, 2021 10:11 am
by Steve-Matrix
Nice one, Stefan. Looks great!