modify data stream by equating odd position=0

Dear sir/Ma'am

I have a data x=[1 2 3 4 5.........k]. Now I want a new data y=[0 2 0 4 0 6........k] from 'x' i.e, in new data stream the odd position's value will be '0' of 'x',rest values will be remain same as 'x'.and also want z= new data stream the even position's value will be '0' of 'x'.

What will be the matlab code?

Answer 1

[Ameer Hamza]

Read about array indexing in MATLAB: https://www.mathworks.com/help/matlab/math/array-indexing.html

k = 10;
x = 1:k;

y = x;
y(1:2:end) = 0;

z = x;
z(2:2:end) = 0;

[Soumili Sen]

woow.. it's awsome. Thnks a lot. And thanks for suggetion.

[Ameer Hamza]

I am glad to be of help!

[Soumili Sen]

I have one query about this method

k = 10;

x = 1:k;

y = x;

y(1:2:end) = 0;

p=h1*y+80;

Here I don't want to use 2 lines to assign the value of y in this same logic. I want to get same value of y,within the expression of p(without writting previous two line).IS it possible?

Thanks in advance

[Ameer Hamza]

Following shows one way to decrease the number of lines

k = 10;
x = 1:k;
p = h1*x.*((-1).^(1:k)>0)+80

But it is obviously more complicated and less readible.

[Soumili Sen]

ok,thanks