Inserting space between values in vector

Question

0 个投票

Hi,

Say I have a vector x = [1 2 3 4] How can I make it x1 = [1 0 2 0 3 0 4 0]

Thank you!!

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Answer 1

Wayne King 2012-8-16

编辑：Wayne King 2012-8-16

0 个投票

Do you have the Signal Processing Toolbox?

 x = [1 2 3 4]; 
 x = upsample(x,2);

If not

    x = 1:4;
    y = zeros(2*length(x),1);
    y(1:2:end) = x;

If you have the Wavelet Toolbox

     x = 1:4;
     y = dyadup(x,0);

Matt Fig 2012-8-16

I learn something new everyday. I didn't know there was a function to do this! Thanks, Wayne.

Answer 2

per isakson 2012-8-16

编辑：per isakson 2012-8-16

0 个投票

One more way to do it

    x  = 1:4;
    x1 = cat( 1, x, zeros(size(x)) );
    x1 = transpose(x1(:));