ferror (Matlab function) Query about errors in file input or output

## Matlab/Scilab equivalent

Matlab | Scilab
    ferror
    mclearerr
    merror

## Particular cases

ferror(fid)

  When Matlab ferror is called with just one input and one output, then Scilab equivalent i merror.

ferror(fid,'clear')

  When Matlab ferror is called with two inputs and just one output, then Scilab equivalent is mclearerr.

For all other cases, there no equivalent in Scilab.