zero padding between data
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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]
采纳的回答
Sriram Tadavarty
2020-4-4
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 个评论
fima v
2020-4-4
Les Beckham
2020-4-4
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
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