diary (Matlab function) Save session to a file

## Matlab/Scilab equivalent

Matlab | Scilab
    diary
    diary

## Particular cases

When a filename is given to save environment, if this file exists, Scilab returns an error message while Matlab save environment at the end of existing file (append).

Note that diary on and diary toggle exist only in Matlab.

The equivalent for Matlab diary off is diary(0) in Scilab.