How to use logical expressions to change the values of a column who matches a condition on a different column?

1 次查看（过去 30 天）
Philippe Corner
Philippe Corner 2018-2-13
评论： Philippe Corner 2018-3-23
If we have a matrix M like
V1. V2. V3.
1 1 1
2 4 9
3 4 0
4 4 3
5 5 1
6 9 5
7 0 3
8 4 5
9 4 6
10 5 2
How could we make zero the values of V2 and V3 which are from 4 to 7? obtaining M2 like:
V1. V2. V3.
1 1 1
2 4 9
3 4 0
4 0 0
5 0 0
6 0 0
7 0 0
8 4 5
9 4 6
10 5 2

请先登录，再回答此问题。

采纳的回答

Birdman
Birdman 2018-2-13
编辑：Birdman 2018-2-13
M=[1 1 1
2 4 9
3 4 0
4 4 3
5 5 1
6 9 5
7 0 3
8 4 5
9 4 6
10 5 2];
M(4:7,2:3)=0

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2018-2-13
>> V = [1 1
4 9
4 0
4 3
5 1
9 5
0 3
4 5
4 6
5 2];
>> V(4:7,:)=0
V =
1 1
4 9
4 0
0 0
0 0
0 0
0 0
4 5
4 6
5 2
>>

类别

在 Help Center 和 File Exchange 中查找有关 Statistics and Machine Learning Toolbox 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