How to do Gaussian Filter 1D?

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Tyann Hardyn
Tyann Hardyn on 11 Dec 2021
Edited: Tyann Hardyn on 11 Dec 2021
Hi, Community
I wanna ask about how to do a Gaussian Filter in just 1D data.... So i have a data vector based on time series like this :
And i want to filter the data by using Gaussian Filter. So, Anyone, How to do that? Thank you so much....

Accepted Answer

Chunru
Chunru on 11 Dec 2021
x = readtimetable("IAGA Daily Magnetic Data (1m) Extraction 04-Jul-2021 (CTS).txt")
x = 1440×8 timetable
Time Var1 Var2 Var3 Var4 Var5 Var6 Var7 Var8 __________ ________ _____ _____ _____ ____ _____ _____ _____ 2021-07-04 00:00:00 22494 47892 47882 0 22494 23.58 42280 2021-07-04 00:01:00 22494 47891 47882 0 22494 23.54 42280 2021-07-04 00:02:00 22494 47891 47882 0 22494 23.58 42280 2021-07-04 00:03:00 22494 47891 47882 0 22494 23.51 42280 2021-07-04 00:04:00 22494 47891 47882 0 22494 23.62 42280 2021-07-04 00:05:00 22494 47891 47882 0 22494 23.77 42280 2021-07-04 00:06:00 22494 47891 47881 0 22494 23.84 42280 2021-07-04 00:07:00 22494 47891 47881 0 22494 23.88 42280 2021-07-04 00:08:00 22494 47891 47881 0 22494 23.92 42280 2021-07-04 00:09:00 22494 47891 47882 0 22494 23.99 42280 2021-07-04 00:10:00 22494 47891 47882 0 22494 24.07 42280 2021-07-04 00:11:00 22494 47892 47882 0 22494 24.18 42280 2021-07-04 00:12:00 22494 47892 47882 0 22494 24.18 42280 2021-07-04 00:13:00 22495 47892 47882 0 22495 24.33 42280 2021-07-04 00:14:00 22495 47892 47882 0 22495 24.37 42280 2021-07-04 00:15:00 22495 47892 47882 0 22495 24.33 42280
w = gausswin(10, 2.5);
w = w/sum(w);
y = filter(w, 1, x.Var7);
plot(x.Var7, 'r'); hold on; plot(y, 'b');
legend('original', 'filtered')
  2 Comments
Tyann Hardyn
Tyann Hardyn on 11 Dec 2021
Hi, Chunru
I have a problem when plotting the gaussian filter result and the original data....
What is x component you re used in Plot? Why it become a range between 0 - 1500 instead of time series data, which mean from 2021-07-04 00:00:00 until 2021-07-04 23:59:00?
I actually have a problem in Var6 Plot. I need to filter the var6 (Horizontal Magnetic Component) and not in var7

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