How to create a circulant matrix column wise?

I want to create M x L circulant matrix column wise,where M=16 and L=20.

Answer 1

[Ameer Hamza]

Check this FEX package: https://www.mathworks.com/matlabcentral/fileexchange/22858-circulant-matrix

Answer 2

[KSSV]

You can refer this fileexchange: https://in.mathworks.com/matlabcentral/fileexchange/22858-circulant-matrix

[ANJANA K P]

Thank you for the response.But I am again getting a square matrix .I need the result as M x L. ie,16*20 matrix as the answer.

Thanks in Advcance.

[KSSV]

Read about Circshift.

m = 16 ; n = 20 ;
r = rand(m,1) ; 
iwant = zeros(m,n) ;
iwant(:,1) = r ; 
for i = 2:n
  iwant(:,i) = circshift(iwant(:,i-1),1) ; 
end

Answer 3

[Bruno Luong]

col = rand(16,1) % your 1-column vector
A = toeplitz(col,col(mod((1:20)-1,end)+1))