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2023.1.0 - 日本語


iconvert

1または8バイト整数表現に変換する

呼び出し手順

y = iconvert(X,itype)

パラメータ

X

浮動小数点数または整数の行列. Complex numbers are not accepted.

y

1,2,4または8バイト整数の行列.

説明

1, 2, 4, または 8バイト整数に変換し,保存します. Please refer to the int8() page for a detailled description.

itypey typeof range
0 (reals)
1 int8 [-128, 127]
2 int16 [-32768, 32767]
4 int32 [-2147483648, 2147483647]
8 int64 [-9223372036854775808, 9223372036854775807]
11 uint8 [0, 255]
12 uint16 [0, 65535]
14 uint32 [0, 4294967295]
18 uint64 [0, 18446744073709551615]

Converting [] always keeps it as is, of type 1 == inttype 0 (decimal type).

b=int32([1 -120 127 312])
y=iconvert(b,1)

iconvert([-3.6 -2.5 -1.2 1.2 2.5 3.6], 1)
iconvert([-%inf %inf %nan], 1)
iconvert([-%inf %inf %nan], 11)
iconvert(-1, 11)
iconvert(-1, 12)
iconvert(-1, 14)
iconvert(-1, 18)
--> iconvert([-3.6 -2.5 -1.2 1.2 2.5 3.6], 1)
 ans  =
 -3 -2 -1  1  2  3

--> iconvert([-%inf %inf %nan], 1)
 ans  =
 -128  127  0

--> iconvert([-%inf %inf %nan], 11)
 ans  =
  0  255  0

--> iconvert(-1, 11)
 ans  =
  255

--> iconvert(-1, 12)
 ans  =
  65535

--> iconvert(-1, 14)
 ans  =
  4294967295

--> iconvert(-1, 18)
 ans  =
  18446744073709551615

参照

  • int8 — 1バイト整数形式に変換する
  • inttype — 整数データ型で使用される整数型
  • double — converts inttype integers or booleans into decimal encoding
  • dec2bin — 10進数から2進数への変換
  • dec2base — 10進数を基底Nの数値(文字列)に変換

履歴

バージョン記述
6.0
  • Support to int64 and uint64 encodings added.
  • This is now instead of
    iconvert([-%inf,%inf], 1)[-128, 127][0, 0]
    iconvert([-%inf,%inf], 2)[-32768, 32767][0, 0]
    iconvert(%inf, 4) 2147483647 -2147483648
    iconvert(%inf, 11) 255 0
    iconvert(%inf, 12) 65535 0
    iconvert(%inf, 14) 4294967295 0
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Last updated:
Mon May 22 12:43:09 CEST 2023