How can I create a correlation graph

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!

[Mathieu NOE]

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]

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.

Answer 1

[Chunru]

% 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

[dj1du]

That's the command I was looking for, thank you very much!