How can i create a new vector with conditions?

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,

[madhan ravi]

Alex you want to assign a value 5 to the vector v if all the columns of d is less than 800 ? if yes then why doesn't the number of elements in v ~= number of columns in d? v has 5 elements whereas d has 6 columns.Please clarify.

[5 5 5 1 1] is not a matrix but a row vector.

[Stephen23]

"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]

Question has been revised.

Answer 1

[Stephen23]

>> 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

[madhan ravi]

+1