down2 - down sampling by factor of 2

Calling Sequence

b=down2(a)

Parameters

• a : input vector
• b : down sampled version of the input vector

Description

This function down samples the input vector by factor of 2. The output length would be half length of the input vector. Odd-indexed element would be abandoned and even-indexed element would be retained. If the length of the input vector And the input could be row vectors or column vectors. The output vector would be row vectors.

Examples

-->a=[1 2 3 4 5];
-->b=down2(a)
 ans =

2 4

-->a=a';
-->b=down2(a)
 ans =

2 4

-->a=[1 2 3;4 5 6];
-->b=down2(a)
Input should be vectors rather than matrixes!

-->a=1;
-->b=down2(a)
Input should be vectors!

  

See Also

up2