Correlation Matrix of a 1x1 Structure

Hello everybody, I have a 1x1 data structure which contains 144 fields (i.e. each field is a 26048x1 vector (double)). I need to find the correlation matrix of this data set (showing the correlation between vectors) and at the end, i need to plot it like the figure below:

be thankful for any idea!

Thanks

Answer 1

[jean claude]

first step you have to construct the big matrix then compute the correlation:

    X=struct2array(here type your structure title)  % data 
    y=corrcoef(X)   % correlation matrix