Replace even element with zero

Hi.

I am trying to replace even elements in my matrix with zero like below:

a = [3 5 4 1 2]

enter magical code here

a = [3 5 0 1 0]

Any help would be greatly appreciated

[Stephen23]

https://web.archive.org/web/20201122054358/https://www.mathworks.com/matlabcentral/answers/656783-replace-even-element-with-zero

Original question by Giovanni Rodriguez:

Replace even element with zero

Hi.

I am trying to replace even elements in my matrix with zero like below:

a = [3 5 4 1 2]

enter magical code here

a = [3 5 0 1 0]

Any help would be greatly appreciated

Answer 1

[KALYAN ACHARJYA]

"I am trying to replace even elements in my matrix with zero like below:"

a(2:2:end)=0

But the example is different ??

a = [3 5 0 1 0]

[Giovanni Rodriguez]

a(2:2:end)=0 makes the even indices = 0. I would like to make the even elements = 0.

[KALYAN ACHARJYA]

a(mod(a,2)==0)=0