How to specify a row and column in an array

1 次查看（过去 30 天）
HC98
HC98 2021-6-16
回答： KSSV 2021-6-16
So I have a 5x80 array and want to write a section of code which subtracts row 1, column 1 from row 2 column 1. How might I do that? I already tried using the (x,:) technique.
This is my attempt:
u1 = u(1,:1);
u2 = u(2,:1);

请先登录，再回答此问题。

回答（1 个）

KSSV
KSSV 2021-6-16
A = rand(5,80) ;
iwant = A(1,1)-A(2,1)
What you tried:
u1 = u(1,:1);
:1 is not valid. Simply you need to index bu u(r,c).
u(1,:) % gives entire first row
u(:,1) % gives entire first column

类别

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

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by