How to use for loop compare all values in a 2x2 matrix?

2 次查看（过去 30 天）

Yuan Yuan Lin 2020-10-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/630203-how-to-use-for-loop-compare-all-values-in-a-2x2-matrix

评论： Yuan Yuan Lin 2020-10-29

Hi.

I'm a beginner and I'm just starting to learn Matlab so I'm not very familiar with the code syntax right now. But I'm working on the following problem.

A = [1, 2; 4, 6]

How do you use for loop to compare all the values in A to see which ones are greater than 3 and have those added together to make D?

Thanks.

采纳的回答

KSSV 2020-10-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/630203-how-to-use-for-loop-compare-all-values-in-a-2x2-matrix#answer_527763

It is your home work...so you have to do it yourself. Follow the below hints.

You can get the dimensions/ size of a matrix using size.
You can comapre the elements using inequalitties >, <. >=, <=.
Also you can use logical indices striaght away with out loop.
To add you have to use +.

You can try what A(:) prints, in command window instead of asking a question. This will help ypu to understand yourself. Anything, you have a doubts just type in command window and see it. You can get yourself.

A(:) this will make a matrix into a single column vector.

idx gives logical indices whose values are >3.

Yuan Yuan Lin 2020-10-29