Explain weird MATLAB behavior

It is the first time that having a diagonal matrix matlab keeps writing the indices of the matlab element I am requiring and then the element values

below I report the results for matlab command window

1.0e+05 *

(1,1) -1.2727

(1,2) 0.0001

vv has been extracted from a structure

Can you explain this behviour

[Stephen23]

https://www.mathworks.com/help/matlab/sparse-matrices.html

Answer 1

[Bruno Luong]

It's a SPARSE matrix

[Marco Pirola]

OK, how can I convert in a regular matrix or extract regular scalar from it?

Thanks a lot

[Bruno Luong]

Extract scalar between sparse and full matrix uses the same syntax

M(i,j)

To convert to full matrix

A = full(S)

[Marco Pirola]

Great, nice shot

Many thanks

[Matt J]

@Marco,

Since you are clearly satisfied with Bruno's answer, you should Accept-click it.