How do you compare 2 correlation matrices?

Hi,

I have 7 correlation matrices, and would like to see which correlation matrix (1 to 6) is most similar to correlation matrix 7. The correlation matrices are 63 x 63 matrices. I used "corrcoef" to create them, so i do have the underlying data

Thanks for your help

I have the following toolboxes in matlab:

Curve Fitting Toolbox         
Database Toolbox              
Datafeed Toolbox              
Financial Toolbox             
Optimization Toolbox          
Parallel Computing Toolbox    
Parallel Computing Toolbox    
Spreadsheet Link EX           
Statistics Toolbox

[the cyclist]

Do you have a definition in your head of what you mean by "most similar"? If so, then is it a mathematical definition, a firm conceptual definition, or a hazy conceptual definition?

[Sean de Wolski]

Agree with the cyclist. Define most similar? minimum absolute difference?

[junk idx] = min(sum(sum(abs(bsxfun(@minus,corrmat3d,corrmat_care_about)),1),2))