How to delete every alternate rows?

Hi,

In the attached array sz, I need to delete every alternate rows starting from first row, (e.g. 1, 3, 5, 7 etc). Could someone help?

[Dyuman Joshi]

You have been active here since 2020, I am really surprised that you had to ask for this.

Answer 1

[Ayush Anand]

Hi,

You can do

sz_new = sz(2:2:end, :);

This will do the job.

[Turbulence Analysis]

Hi,

Thanks!

Actually this keeps 1, 3, 5, 7 ........... rows and deleting 2, 4, 6, 8 ...... I need reverse, i..e keeping 2, 4, 6, 8 .. and delete 1,3, 5, 7...

[Ayush Anand]

Hey, this keeps rows 2,4,6,8... only. Just check once. If you need to keep rows 1,3,5,7,....just do sz_new= sz(1:2:end,:);

[Turbulence Analysis]

Thanks very much. This is great!

[Aquatris]

Alternatively you can also delete them from your current variable:

x = 1:10;
x % show x

x = 1x10

1 2 3 4 5 6 7 8 9 10

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x(1:2:end) = [];% delete odd idx values
x % show x after removing odd values

x = 1x5

2 4 6 8 10

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