isfield (Matlab function) Determine if input is a structure array field

## Matlab/Scilab equivalent

Matlab | Scilab
    isfield
    No equivalent

## Particular cases

There is no Scilab equivalent function for Matlab tf=isfield(A,field) but there are equivalent instructions:

If A is not a structure and/or field is not a character string:

  Scilab equivalent is %F.

If A is a structure and field is a character string:

  Scilab equivalent is allfields=getfield(1,A);tf=or(allfields(3:$)==field);.