指定した次元に沿って x ブロック要素を反転
y = flipdim(x, dim) y = flipdim(x, dim, blockSize)
ベクトル、行列、または任意の通常のデータ型のハイパーマトリックスを含む、
or cells array.
y
はx
のサイズを取得します.
positive integer : index of the dimension / direction of x
along which the order of x
components must be inverted.
a positive integer, sub-multiple of size(x,dim)
:
number of rows, of columns, of pages etc in each block. Default value = 1
flipdim(x, 1)
inverts the order of
rows of x
.
flipdim(x, 2)
inverts the order of
columns of x
.
flipdim(x, 3)
inverts the order of
pages of x
. Etc.
The optional parameter blockSize
allows splitting
x
in size(x,1)/blockSize
blocks
of blockSize
rows (dim=1
),
or in size(x,2)/blockSize
blocks of blockSize
columns (dim=2
), etc (dim>2
)
and to invert their order.
In each block, the order of components (rows, columns, pages etc)
is unchanged.
// 例 1: x の要素を最初の次元に沿って反転 x = [1 2 3 4; 5 6 7 8]; y = flipdim(x, 1) // 例2: x の要素を2番目の次元に沿って反転 y = flipdim(x, 2) // 例3: x の要素を3番目の次元に沿って反転 x = matrix(1:48,[3 2,4,2]); y = flipdim(x, 3) // 例4: 最初の例を複素数に x = [1+%i 2*%i 3 4; 5 6-%i 7 8*%pi*%i] y = flipdim(x, 1) // 整数エンコードされた数値 x = int16(grand(4, 3, 2, "uin", -9, 9)) y = flipdim(x, 1) // 論理値: x = (grand(3, 4, "uin", -9, 9) > 0) y = flipdim(x, 2) // テキスト: x = matrix(strsplit("a":"x", 1:23), 4, 6); x = x+x flipdim(x, 2) // 多項式: x = inv_coeff(grand(3, 9, "uin", 0, 3), 2) flipdim(x, 1) // 有理数: n = inv_coeff(grand(3, 9, "uin", 0, 3), 2); d = inv_coeff(grand(3, 9, "uin", 0, 3), 2); r = n./d flipdim(r, 2) | ![]() | ![]() |
blockSize
の使用例 :
Example of results:
--> x x = -5 -2 0 9 0 -7 -6 9 -1 -8 -7 8 --> flipdim(x, 1) ans = -1 -8 -7 8 0 -7 -6 9 -5 -2 0 9 --> flipdim(x, 2) ans = 9 0 -2 -5 9 -6 -7 0 8 -7 -8 -1
--> x x = (:,:,1) 9 4 -3 -4 -8 -3 (:,:,2) 5 8 9 4 4 9 --> flipdim(x, 3) ans = (:,:,1) 5 8 9 4 4 9 (:,:,2) 9 4 -3 -4 -8 -3
--> x x = -2 3 -5 9 -4 -8 2 8 4 -9 6 -6 -9 8 3 4 -3 4 --> flipdim(x, 2, 2) ans = -4 -8 -5 9 -2 3 6 -6 4 -9 2 8 -3 4 3 4 -9 8 --> flipdim(x, 2, 3) ans = 9 -4 -8 -2 3 -5 -9 6 -6 2 8 4 4 -3 4 -9 8 3
Version | Description |
5.5.0 | 10進数から任意の型に拡張: 論理値, 整数, 文字列, 多項式および有理数.
x ブロック毎に反転するために,
新しい入力引数 blockSize が追加されました. |