type 変数の型を返す

## 呼び出し手順

    [i]=type(x)

## パラメータ

x

  Scilab オブジェクト

i

  整数

## 説明

`type(x)` は,以下のように `x`の型の種類を整数で返します :

1 : 実数または複素数の定数行列.

2 : 多項式行列.

4 : 論理値行列.

5 : 疎行列.

6 : 論理値疎行列.

7 : Matlab 疎行列.

8 : 1 2 4 または 8 バイトに保存される整数行列.

9 : グラフィックハンドルの行列.

10 : 文字列の行列.

13 : コンパイル済みの関数 (Scilab コード).

14 : 関数ライブラリ.

15 : リスト.

16 : 型付リスト (tlist).

17 : 行列の型付リスト (mlist).

128 : Xcosブロックへのポインタ(参照)、lufact()の結果へのポインタな.

129 : 添字に使用される暗黙の大きさの多項式.

130 : Scilab 内部コード (C または Fortran コード).

0 : An undefined element of a list (with a typeof `void`, such as in the function call `foo(a,,b)`, or in `list(%pi,,%i,,,%z)`), or a null object of typeof `listdelete` returned by `null()`.

### Remarks

Some data may be stored in custom containers defined as typed lists of type 16 (tlist) or 17 (matrix-oriented typed mlist). This is also the case for embedded types like (rationals), structures (struct), state-space, interactive trees (uitree), etc, for which `type(..)` will return 16 or 17. One will use typeof to get more information about their actual (sub)type.

Type conversion in mixed operations:

When a binary operator (like the multiplication) or an n-ary iterated one (like the concatenation) is applied beween two operands of distinct but compatible types, usually the type of one of both is implicitely converted, and the other operand sets the type of the result to its own type.

Examples with the concatenation : `[%t, 3.124]`, `[int8(5), 3.124]`, etc.

For the concatenation, addition, substraction, multiplication, division, and the power operation, the hierarchy between operands types is as follows (read "A < B": B imposes its type to A) :

- boolean < (decimal number, complex encoded number)
- (decimal number, complex-encoded number) < encoded integer.
- polynomial (real | complex) < rational (real | complex)

## Examples

    // (Select some lines, right-click and choose "Execute.." to run the selection)
    L = list(%pi,,"abc");
    type(L(2))                  // undefined component of a list

    type(42)                    // decimal numbers
    type(%nan)
    type(%inf)

    type(1+%i)                  // complex numbers

    s = sparse([1,2;4,5;3,10],[1,2,3]);
    type(s)                     // sparse-encoded decimal or complex numbers

    type(%t)                    // booleans

    type(s>2)                   // sparse-encoded booleans

    g = int8([1 -120 127 312]); // encoded integers
    type(g)
    type(1.23 * int8(4))

    type(1-%z+%z^2)             // polynomials

    type(gdf())                 // graphic handles

    type("foo")                 // texts

    deff('[x] = mymacro(y,z)',['a=3*y+1'; 'x=a*z+y']);
    type(mymacro)               // Scilab functions

    type(disp)                  // Built-in functions

    l = list(1,["a" "b"]);      // simple lists
    type(l)

    e = tlist(["listtype","field1","field2"], [], []);
    type(e)                     // Typed list

    h = mlist(['V','name','value'],['a','b';'c' 'd'],[1 2; 3 4]);
    type(h)                     // Typed matrix-oriented list

    clear s, s.r = %pi          // structures
    type(s)

    c = {%t %pi %i %z "abc" s}  // cells
    type(c)

    r = [%z/(1-%z) (1-%z)/%z^2]
    type(r)                     // rational fractions

## 参照

- typeof
- inttype
- isreal
- brackets
- overloading
- poly
- rational
- tlist
- mlist
- null

## 履歴

6.0 The type 11 is removed. It was used for uncompiled Scilab functions.