zero padding between data
23 views (last 30 days)
Show older comments
Hello, i have a vector shown bellow, how do i insert two zeros in between every bumber as shown bellow.
Thanks.
a=[1,2,3,4]
a=[1,0,0,2,0,0,3,0,0,4]
0 Comments
Accepted Answer
Sriram Tadavarty
on 4 Apr 2020
Hi Fima,
You can perform this task in many ways, one simple way is this:
% Assign a variable with zeros for the length of the output
out = zeros(10,1);
out(1:3:end) = a;
Hope this helps.
Regards,
Sriram
2 Comments
Les Beckham
on 4 Apr 2020
I had to look at this for a while to figure out why it works as well.
I will try to explain. The line
out(1:3:end) = a;
works because out(1:3:end) is the same as out([1 4 7 10]) and so is a 4 element vector. The vector a is also a 4 element vector and thus the assignment works, with each element of the right hand vector being assigned into the corresponding element of the left hand vector.
Here is a version that isn't so hard-coded. It supports different sized input vectors and different numbers of 'padding' zeros.
% Inputs - change as desired
a = [1 2 3 4];
pad_size = 2;
% Process the inputs
initial_size = numel(a);
final_size = initial_size + (pad_size * (initial_size - 1));
% Assign a variable with zeros for the final size of the output
out = zeros(1,final_size); % modified to be a row instead of a column
out(1:pad_size+1:end) = a;
out % display the result
More Answers (0)
See Also
Categories
Find more on Data Type Conversion in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!