how to calculate the period of climate data?

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编辑： Jonas 2022-6-23

Hi every body

i need to know the priof of climate dat for exa,ple for temperature

my data is monthly from 1950 to 2021

so if i want to know whow many minths the data will be repeat or have change

how i can find it

Jonas 2022-6-23

编辑：Jonas 2022-6-23

if you have periodic data and you want to find the period, try to use the xcorr variable to find it

[corVal,lag]=xcorr(yourData);

plot(lag,corVal);

% e.g.

[corVal,lag]=xcorr([1 2 3 4 3 2 1 2 3 4 3 2 1 2 3 4 3 2 1 2 3 4 3 2 1]);

% to plot the peaks

findpeaks(corVal,lag);

% to get position and peak value

[maxVal,loc]=findpeaks(corVal,lag,'Annotate','peaks')

maxVal = 1×5

87 130 173 130 87

loc = 1×5

-12 -6 0 6 12

here, we see e.g. a period of 6 months if each value in the original data was given in month spacing

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