Create a matrix from another matrix

Question

Giannakis Stoukas 2015-5-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/214925-create-a-matrix-from-another-matrix

编辑： Stephen23 2015-5-4

I have a matrix A=[ 5 6 4; 1 2 8; 9 7 11] and two arrays that have the coordinates x,y of every variable of the matrix A.I want to create two matrixes.The first one will have instead the variables of matrix A,the x coordinate and the other one matrix the y.For example the matrix X will have X=[x(5) x(6) x(4); x(1) x(2) x(8); x(9) x(7) x(11)]. Can i do it with one command.At my problems i have much bigger matrixes and i cant write it one by one.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Titus Edelhofer 2015-5-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/214925-create-a-matrix-from-another-matrix#answer_177695

在 MATLAB Online 中打开

Hi Giannakis,

I guess just by using A as index:

A=[ 5 6 4; 1 2 8; 9 7 11];
x = 1:2:21
x =
   1     3     5     7     9    11    13    15    17    19    21
x(A)
ans =
   9    11     7
   1     3    15
  17    13    21