parents

Scilab Function
Last update : April 1993

parents - ( ) left and right parenthesis

### Calling Sequence

  `(expression)`
  `[...]=func(e1,e2,...)`
  `[x1,x2,...]=(e1,e2,...)`
  `x(i,j)`
  `v(i)`
  `[...]=l(i)`

### Parameters

- `x`: matrix of any possible type
- `v`: row or column vector of any possible type
- `l`: list variable
- `func`: any function name
- `e1,e2,...` : any possible type expression

### Description

Left and right parenthesis are used to

* Specify evaluation order within expressions,

* Form right-hand-side functions argument list. Within multiple rhs arguments must be separated by comma.

* Select elements within vectors, matrices and lists. see help on extraction and insertion for more precisions

* [x1,x2,...]=(e1,e2,...) is equivalent to first performing %t_1 = e1, %t_2 = e2, ..., and then x1 = %t_1, x2 = %t_2, ..., where the variables %t_i, i = 1, 2, ... are invisible to the user.

### Examples

    3^(-1)
    x=poly(0,"x");
    //
    (x+10)/2
    i3=eye(3,3)
    //
    a=[1 2 3;4 5 6;7 8 9],a(1,3),a([1 3],:),a(:,3)
    a(:,3)=[]
    a(1,$)=33
    a(2,[$ $-1])
    a(:,$+1)=[10;11;12]
    //
    w=ssrand(2,2,2);ssprint(w)
    ssprint(w(:,1))
    ss2tf(w(:,1))
    //
    l=list(1,2,3,4)
    [a,b,c,d]=l(:)
    l($+1)='new'
    //
    v=%t([1 1 1 1 1])
    //
    [x,y,z]=(1,2,3)

### See Also

`colon`, `comma`, `brackets`, `list`, `extraction`, `insertion`,