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function y = upsamplefill (x, v, c)
//This function upsamples a vector interleaving given values or copies of the vector elements.
//Calling Sequence
//
//y = upsamplefill (x, w, cpy)
//Parameters
//x: scalar, vector or matrix of real or complex numbers
//w: scalar or vector of real or complex values
//cpy: can take in "true" or "false", default is false
//Description
//This is an Octave function.
//This function upsamples a vector interleaving given values or copies of the vector elements.
//The second argument has the values in the vector w that are placed in between the elements of x.
//The third argument, if true, means that w should be scalar and that each value in x repeated w times.
//Examples
//1.upsamplefill([1,3,5],2,%f)
//ans:1. 1. 1. 3. 3. 3. 5. 5. 5.
//2.upsamplefill([1,3,5],2,%t)
//ans:1. 2. 3. 2. 5. 2.
if argn(2)<2
error("wrong no. of input arguments")
end
[nr,nc] = size (x);
if c==%f
if (nr==1 | nc==1)
y = kron (x(:), ones(v+1,1));
if nr == 1
y = y.';
end
else
y = kron (x, ones(v+1,1));
end
return
else
//Assumes 'v' row or column vector
n = length(v) + 1;
N = n*nr;
if (nr==1 | nc==1)
N = N*nc;
idx = 1:n:N;
idx_c = setdiff (1:N, 1:n:N);
y = zeros (N,1);
y(idx) = x';
y(idx_c) = repmat (v(:), max(nr,nc), 1);
if nr == 1
y = y.';
end
else
idx = 1:n:N;
idx_c = setdiff(1:N,1:n:N);
y = zeros (N,nc);
y(idx,:) = x';
y(idx_c,:) = repmat (v(:), nr, nc);
end
end
endfunction
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