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Scilabヘルプ >> Sparses Matrix > Sparse Matrix Manipulation > speye

speye

疎単位行列

呼び出し手順

Isp = speye(A)
Isp = speye(nrows, ncols)

引数

nrows

整数 (行数)

ncols

整数 (列数)

A

疎行列

sp

疎単位行列

説明

Isp=speye(nrows,ncols) は, nrows 行, ncols 列の 疎単位行列Ispを返します. (非正方行列は主対角項に1を有します).

Isp=speye(A)Aと 同じ次元の疎単位行列を返します. [m,n]=size(A)の場合, speye(m,n) および speye(A)は等価です.

なお, speye(3)speye(3,3)と等価ではありません.

eye(3,3) - full(speye(3,3))

参照

  • sparse — 疎行列を定義
  • full — 疎行列を通常の行列に変換する
  • eye — 単位行列
  • diag — 対角行列の構築または展開
  • toeplitz — Toeplitz matrix (chosen constant diagonal bands)
  • spzeros — 疎ゼロ行列
  • spones — 疎行列
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