2D cross correlation between NIR and MIR data

Hi everyone, can anyone help me on how to compute a 2D cross correlation analysis please. I have NIR and MIR absorbance dataset I need to peform a cross corrrelation to check for similar trends between the two responses. Can anyone assit me with the code to analyse this please? Thank you

The datasset is a 22 by 12001 NIR and 22 by 13001 MIR.

Answer 1

[Gourab]

Hi Doyinsola,

I understand that you want to find the 2D cross-correlation between NIR and MIR data matrices.

The `xcorr2()` function computes the cross-correlation between two 2D arrays, treating one as the reference and the other as the template.

Please refer to the below code snippet on using the `xcorr2()` function.

% Load your NIR and MIR data from file
load('nir_data.mat');
load('mir_data.mat');

% Transpose the NIR and MIR data matrices
nir_data = nir_data.';
mir_data = mir_data.';

% Compute the cross-correlation between the NIR and MIR data
cc = xcorr2(nir_data, mir_data);

% Display the cross-correlation as an image
figure;
imagesc(abs(cc));
colormap('jet');
colorbar;

Please refer to the below documentation link for more information on ‘xcorr2()’ function.

https://www.mathworks.com/help/signal/ref/xcorr2.html

I hope this helps you to resolve the query.

[Doyinsola]

Thank you, it does. I later find a way to it yesterday and it is exactly same as your answer. Thank you.