How can I surrogate data in MATLAB?

Hello all

I want to surrogate my data (500x1 excel file) but I have no idea how to do that and since I have little time left for that I need to do that fast and so I do not have enough time to go through fundamentals of surrogating data (I am using R2022b version).

Can anyone provide me a simple code for surrogating data? Thanks in advance!

Answer 1

[Sameer]

Hi @Mir Sahand

Surrogating data typically involves generating a new dataset that preserves certain properties of the original dataset, such as its mean and variance, but randomizes other aspects to test statistical hypotheses.

Here's a simple way to surrogate your data by shuffling it. This is one of the simplest surrogate data methods:

% Load your data from the Excel file
data = xlsread('your_file.xlsx');

% Surrogate the data by shuffling
surrogateData = data(randperm(length(data)));

xlswrite('surrogate_data.xlsx', surrogateData);

Hope this helps!

[Mir Sahand]

Thanks a lot @Sameer

your answer really helped me out!

can you please mention one or two other methods for surrogating data or maybe their code source?