How can i create a new vector with conditions?

2 次查看（过去 30 天）

Alex Yande 2019-4-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/455722-how-can-i-create-a-new-vector-with-conditions

评论： madhan ravi 2019-4-11

d=[100 200 300; 
   250 350 450; 
   810 550 600; 
   500 700 400]
v=[1 1 1 1]

d has 4 rows and v has 4 elements.

If d's all of the elements of any row are less than 800, v (row) must be equal to 5. But this process must continue until any element of any row is greater than 800.

Example:

d(1,:)<800 so v(1)=5

d(2,:)<800 so v(2)=5

d(3,:), all of them not less than 800. So v(3)=1

d(4,:)<800. But v(4) will not be changed. Because we find a value which is greater than 800 at row 3.

How can i achieve this problem?

Thanks,

3 个评论
显示 1更早的评论隐藏 1更早的评论

Stephen23 2019-4-11

"v must be have 5 elements"

I count six elements in your example output:

"Final matrix should be [5 5 5 1 1 1]."

Please revise and correct your question so that we know what you want.

Alex Yande 2019-4-11

Question has been revised.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Stephen23 2019-4-11

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/455722-how-can-i-create-a-new-vector-with-conditions#answer_370156

在 MATLAB Online 中打开

>> d = [100,200,300;250,350,450;810,550,600;500,700,400]
d =
  100  200  300
  250  350  450
  810  550  600
  500  700  400
>> v = 1+4*cumprod(all(d<800,2))
v =
  5
  5
  1
  1