Scilab Function

definedfields - return index of list's defined fields

### Calling Sequence

  `k=definedfields(l)`

### Parameters

- `l` : a list , tlist or mlist variable.
- `k` : a vector of index.

### Description

If `l` is a `list` `tlist` `mlist` `k=definedfields(l)` returns in `k` the indices of the defined list fields. This function is useful because indexing undefined fields produces an error.

### Examples

    l=list(1);l(3)=5
    k=definedfields(l)

    t=tlist('x');t(5)=4
    definedfields(t)

    m=mlist(['m','a','b']);m.b='sdfgfgd'
    definedfields(m)

### See Also

`list` `tlist` `mlist` `insertion` `extraction`