i have a proplem with some matrix

1 次查看(过去 30 天)
ali
ali 2014-12-23
回答: mohammad 2014-12-23
how can i get [10 0;0 10] and [-10 0 ;0 -10] from squre root of [100 0;0 100] ali

回答(2 个)

Geoff Hayes
Geoff Hayes 2014-12-23
Ali - if you assume that all elements in your matrix are positive, then you could use the sqrt function as
A = [100 0 ; 0 100];
R1 = sqrt(A);
R2 = -sqrt(A);
  1 个评论
ali
ali 2014-12-23
编辑:ali 2014-12-23
in this case i should have two result , but in case A.1/3 i should have 3 results ,and what if they are negitive ?

请先登录,再进行评论。


mohammad
mohammad 2014-12-23
You can use this
A = [100 0 ; 0 100];
syms B
solve('B*B-A')
this gives you two answers and if arrays of A are negative, there will be no problem.

类别

Help CenterFile Exchange 中查找有关 Symbolic Math Toolbox 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by