doubt to store a array values in for loop ?

Dear sir i have doubt to store a array values in for loop. I will explain my code Program:

a=[1 2 3 4 5 6 7 8 9 10]
for i=1:3:10
  k(i)=a(i)
end

I need store the values in k variable. i am getting answer k= 1 0 0 3 0 0 6 0 0 9 0 but i need answer like that k=1 3 6 9 is it p[ossible to write the answer like that .

please help me.

[Stephen23]

MATLAB is a high-level language, so why bother with an ugly loop as if it was just C or something similar? You can do it much neater, faster, and much more efficiently using basic MATLAB indexing:

>> a = [1,2,3,4,5,6,7,8,9,10];
>> b = a(1:3:10)
b =
     1     4     7    10
>> c = a(1:2:10)
b =
     1     3     5     7     9

Note that I gave two sequences: this is because your output sequence does not have an equal step size (it is not an arithmetic progression), so you cannot generate it using any method that assumes a constant step size (in particular the colon operator). You can check the step size of your solution:

>> diff([1,3,6,9])
ans =
     2     3     3

Answer 1

[UNK]

Hi Ravi, If you have a row vector as a = 1:1:10 and you want only some entries as a new vector you can do b = a([1:3:10])

 a = 1:1:10
 b = a([1:3:10])

For loops are not efficient. You can look at this which may be useful

Answer 2

[Azzi Abdelmalek]

a=[1 2 3 4 5 6 7 8 9 10]
ii=0
for i=1:3:10
  ii=ii+1;
  k(ii)=a(i)
end