how to duplicate data length of a workspace ?

hello all,

i have a data in workspace, for example a column of 1 2 3 4 , and i have an other data with a column with a N length, i want to have a new column that contain the 1 2 3 4 and repeat it till it arrive to N length, how to do that ?

thank you.

Answer 1

[imene. B]

data = evalin('base','data')
Y = evalin('base','Y')
M=length(data)/length(Y);
(assignin('base','M',M))
D=repmat(Y,M);
(assignin('base','D',D))

Answer 2

[James Tursa]

E.g., assuming N is divisible by 4:

result = repmat(column_vector,N/4,1);

If you have to cover cases where N is not divisible by 4, e.g.,

result = repmat(column_vector,ceil(N/4),1);
result = result(1:N);

or another way

result = column_vector(mod(0:N-1,4)+1);

If your column_vector is not really 4 elements but something else, simply replace 4 with numel(column_vector) in the above code.

[imene. B]

thank you james, just in the moment that i figured it out :D