How to change the number of digits over 15.

Hello! Can anyone help me with the number of digits? I need to set it over 15, around 40 or so. I know the vpa command can help but i cannot unerstand it that well. Is there any way to set the number to 40 for all operations in the workplace. Thank you very much

Answer 1

[Matt Fig]

digits = 40;  % Only works if you have the symbolic toolbox

But this only applies to symbolic variables. You cannot get more than 16 or so digits out of double values by definition.

N = 10/3;
isa(N,'double')  % Yes, N is a double.
Ns = vpa(N)
isa(Ns,'sym')    % Yes, Ns is a sym.

Answer 2

[Lazaros Moysis]

Ok i get it, thank you very much