How can I create a correlation graph

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dj1du
dj1du am 30 Mai 2022
Kommentiert: dj1du am 31 Mai 2022
Good evening!
I need to plot the correlation of a set of differently indexed vectors just like in the attached plot (I found it in a scientific publication).
By which Matlab command is it possible to create such a plot?
Thank you very much for your help!
  2 Kommentare
Mathieu NOE
Mathieu NOE am 31 Mai 2022
hello
The following MATLAB® functions compute sample correlation coefficients and covariance. These sample coefficients are estimates of the true covariance and correlation coefficients of the population from which the data sample is drawn.
Function Description
corrcoef Correlation coefficient matrix
cov Covariance matrix
xcorr Cross-correlation sequence of a random process (includes autocorrelation)
The MATLAB function corrcoef produces a matrix of sample correlation coefficients for a data matrix (where each column represents a separate quantity). The correlation coefficients range from -1 to 1, where. Values close to 1 indicate that there is a positive linear relationship between the data columns.
dj1du
dj1du am 31 Mai 2022
Bearbeitet: dj1du am 31 Mai 2022
Thank you very much for your answer! I don't want to be rude, but my question was rather pointed at how to create a plot like the attached one, when I already have some correlation values for each pair of vectors. I am looking for the Matlab command to create such a plot.

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Chunru
Chunru am 31 Mai 2022
Bearbeitet: Chunru am 31 Mai 2022
% data matrix
nv = 10; % number of variables
ns = 80; % number of samples
x = randn(ns, nv);
% Correlation coeff
r = corrcoef(x);
%imagesc(r);
imagesc(abs(r));
colorbar; axis xy
  1 Kommentar
dj1du
dj1du am 31 Mai 2022
That's the command I was looking for, thank you very much!

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