fieldnames get a tlist, mlist or struct fields names

## Syntax

    f = fieldnames(lst)

## Arguments

lst

  A tlist, mlist or struct variable.

f

  Strings column vector of fields names.

## Description

The `fieldnames` function returns field names of a `tlist`, `mlist` or `struct`. `fieldnames` does not work on cells.

As said in rational or syslin help pages, internal representation of some Scilab objects is a tlist (or rlist), so using `fieldnames` with them will return the generic forms of these objects. For example, for rationals, the function will return "num","den" and "dt".

## Examples

                fieldnames(tlist(['listtype', 'f1', 'f2'], [], []))
                fieldnames(mlist(['V', 'key', 'value'], ['a' 'b' ; 'c' 'd'], [1 2 ; 3 4]))
                fieldnames(struct('f1', 25, 'month', 'DEC', 'year', 2006))
                obj.x = 3;
                obj.y = 3;
                fieldnames(obj)
                fieldnames(1/%s)
                fieldnames(tf2ss(1/%s))

## See also

- extraction
- getfield
- tlist
- mlist
- struct