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Please note that the recommended version of Scilab is 6.0.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Elementary Functions > logm

logm

正方行列の対数

呼び出し手順

y=logm(x)

パラメータ

x

正方行列

説明

logm(x)xの対数行列です. xが正定でない場合には結果が 複素数となります. xが対称行列の場合, 掲載は schur 形式で行われます. その他の場合, x は対角化可能と仮定されます. expm(logm(x))=xとなります.

A=[1,2;3,4];
logm(A)
expm(logm(A))

A1=A*A';
logm(A1)
expm(logm(A1))

A1(1,1)=%i;
expm(logm(A1))

参照

  • expm — 正方行列の指数関数
  • log — 自然対数
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Last updated:
Thu Mar 03 11:00:51 CET 2011