To generate matrix from an array

15 次查看（过去 30 天）
brijesh soni
brijesh soni 2019-9-24
回答： Jos (10584) 2019-9-24
Let say I have A=[1; 2; 3; 4; 5; 6; 7; 8] as a single column array. and i want to generate the matrix B and matrix C such that
B=[1 2 3; 2 3 4; 3 4 5; 4 5 6; 5 6 7; 6 7 8]. %if repeation of last two elements of previous row is carried out%
C=[1 2 3 4; 2 3 4 5; 3 4 5 6; 4 5 6 7; 5 6 7 8; ] %if repeation of last three elements of previous row is done% and so on
Please help me to code this.

请先登录，再回答此问题。

采纳的回答

Adam Danz
Adam Danz 2019-9-24
编辑：Adam Danz 2019-9-24
Use implicit expansion. (starting r2016b)
B = A(1:end-2) + (0:2); %assuming A is a column vector
C = A(1:end-3) + (0:3); %assuming A is a column vector

更多回答（1 个）

Jos (10584)
Jos (10584) 2019-9-24
More general, using indexing:
A = [1 22 3 44 55 666 7 888 9]
n = 2
B = A(((1:numel(A)-n).' + (0:n)))

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by