试用软件

Create a matrix from another one with an history window of 3 columns

1 次查看（过去 30 天）

显示更早的评论

Julien Benistant 2020-1-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499776-create-a-matrix-from-another-one-with-an-history-window-of-3-columns

评论： Julien Benistant 2020-1-13

Could someone help me with my problem.

I've got an original 2 by 25 matrix and I want to create a new 2 by 25 matrix with the same columns than the original one. But I want them reorganized such that a given column (:,n) in the new matrix is different from the columns (:,n:n+2) of the original matrix.

I've struggled to do that as Ifind a way using loops that need a lot of if statement to control for special cases... Is there someone with a simple(r) method to do that?

4 个评论
显示 2更早的评论隐藏 2更早的评论

Stephane Dauvillier 2020-1-13

OK? sorry I don't know what you mean

Julien Benistant 2020-1-13

Sorry I wasn't clear but I found a simple solution, I post it here in case of someone need help:

A= [1,3,5,7,8];

B = [4,12,20,28,32];

C = combvec(A,B);

S = randi([4 21],1);

V = [C(:,S:end), C(:,1:S-1)];

Basically I've just created a new matrix (V) randomly lagged (S) compared to the original one (C) !

Best,

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Stephane Dauvillier 2020-1-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499776-create-a-matrix-from-another-one-with-an-history-window-of-3-columns#answer_409588

在 MATLAB Online 中打开

You can try the function diff:

A = magic(5);
B = diff(A,[],2)

But B will have n-1 column what do you want for the extra column ?

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。

类别

MATLAB Language Fundamentals Loops and Conditional Statements

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

产品

MATLAB

版本

R2015b

Community Treasure Hunt

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

Translated by

试用软件